OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Smartwatches Methodology v3.0
Smartwatches Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Smartwatches Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Smartwatches Methodology v3.0

Fire-Boltt Grenade review: 127 specs compared

Avg. price:~£20Screen size:1.39 inchBattery life:7 daysDisplay type:TFT LCD

Fire-Boltt Grenade Review: Compare 127 technical specifications and 14 expert and video reviews to see how this product ranks in the Smartwatches category and whether it is worth buying.

Fire-Boltt Grenade
6.7/10

Overall score

Score
6.7/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, best-of lists, expert reviews and owners.
How we count it
Parts: Technical score 35%, List score 30%, Reviews score 25%, Sentiment score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 60% of models
Score components

35%

5.4

Technical score

30%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

25%

8.1

Reviews score

10%

5.4

Sentiment score

â–¼Worse than 60% of smartwatches
7.7

Value for money

Value for money
7.7/ 10
✕
What it is
An indicator that combines the smartwatch's overall rating with its cost.
When it matters
When you are looking for a smartwatch with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 56% of models
Score components

70%

6.7

Overall score

30%

10

Price

â–¼Worse than 56%
5.4

Technical score

Technical score
5.4/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 75% of models
Score components

24%

6.3

Health

21%

6.0

Fitness

16%

5.6

Battery

14%

5.1

Smart features

12%

2.5

Connectivity

9%

5.2

Display & Design

4%

5.7

Hardware

â–¼Worse than 75%
8.1

Reviews score

Reviews score
8.1/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Every review counts the same: written or video, short or full test.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.4 for now.
Share: Reviews count 25% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 59% of models

80%

8.3

Average grade

20%

7.7

Popularity

Grades by review (14)
14 videos, average 8.4/10. Reviews count 25% of the overall score.
User ratings collected online are not part of this score.
â–²Better than 59%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
  • fire-boltt-grenade
fire-boltt-grenade
Where to buy
    N/A~ £20
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.

What reviewers say about the Fire-Boltt Grenade

Based on 0 · 12

Reviewers love the sturdy build and strong speaker, but most say health readings are inaccurate and the battery runs down quickly.
Praised
Criticised
Pick a topic to see who said what

What owners say about the Fire-Boltt Grenade

Based on 46 owners sharing their experience in online comments

13%positive35%mixed52%negative

Owners like its rugged, premium look and playful use, but frequent failures and poor support dominate the experience.

What owners dislike

  • Several owners say the watch stopped powering on, most often after a few weeks or months of use, and some say a tap or drop came before the failure.10
  • Owners report calls not ringing or ringing only as vibration, call buttons not responding, caller voice not reaching the other person, and call names not showing.7
  • Sensors and tracking give unreliable results6
  • Owners report slow, unhelpful replacement and service, with replacements told to be out of stock and only coupons offered instead.5
  • Owners who bought it for the game feature say the advertised games are not on the watch, and returns are refused in favor of replacement only.4
  • Owners say the side buttons stopped working within a week or a few months, and some see red or black lines appear on the screen.3
  • Some owners say the display stays dark after notifications or fails to light up, and one reports the screen broke completely.3
  • Owners report heavy battery drain, with the watch losing a lot of charge overnight even when switched off, and only about 3 days of battery life.3
  • Owners say raise-to-wake is slow or unreliable, and the quick view feature is slow to open.3

Points mentioned by at least 3 owners, most mentioned first.

Loading category ranking...

Technical Specifications of smartwatch Fire-Boltt Grenade

Technical score
Technical score
5.4/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 75% of models
Score components:

24%

6.3

Health

21%

6.0

Fitness

16%

5.6

Battery

14%

5.1

Smart features

12%

2.5

Connectivity

9%

5.2

Display & Design

4%

5.7

Hardware

5.4
Reviews score
8.1
List score
?
Value for money
Value for money
7.7/ 10
✕
What it is
An indicator that combines the smartwatch's overall rating with its cost.
When it matters
When you are looking for a smartwatch with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 56% of models
Score components:

70%

6.7

Overall score

30%

10

Price

7.7
Heart rate monitor
yes
This smartwatch includes a heart rate monitor. 9.5% of smartwatches include a heart rate monitor.
Blood oxygen monitoring
yes
This smartwatch supports blood oxygen monitoring. 30.4% of smartwatches support blood oxygen monitoring.
Readings are for wellness use, not medical diagnosis.
ECG
no
This smartwatch does not support ECG. 18.2% of smartwatches support ECG.
Irregular heart rate warnings
yes
This smartwatch supports irregular heart rate warnings. 49.5% of smartwatches support irregular heart rate warnings.
HRV tracking
no
This smartwatch does not support HRV tracking. 45.2% of smartwatches support HRV tracking.
Show more
What reviewers say
Accelerometer
yes
This smartwatch includes an accelerometer. 0.5% of smartwatches include an accelerometer.
Barometer
yes
This smartwatch includes a barometer. 46.5% of smartwatches include a barometer.
Gyroscope
no
This smartwatch does not include a gyroscope. 71.3% of smartwatches include a gyroscope.
Cadence sensor
no
This smartwatch does not include a cadence sensor. 32.9% of smartwatches include a cadence sensor.
Distance tracking
no
This smartwatch does not support distance tracking. 96.4% of smartwatches support distance tracking.
Show more
What reviewers say
Battery life
7 days
Market range: <1 day – >20 days
This smartwatch lasts 7 days on a charge, which is longer than 36.1% of Smartwatches and the same as 15.9% of Smartwatches.
Up to 2 days with bluetooth calling.
Battery life in training mode
?
Battery life with GPS on
N/A
Battery power
350 mAh
Market range: <200 mAh – >500 mAh
This smartwatch has a 350 mAh battery, which is larger than 60.7% of Smartwatches and the same as 2% of Smartwatches.
Charge time
120 min
Market range: <60 min – >150 min
This smartwatch charges from empty in 120 min, which is quicker than 13.3% of Smartwatches and the same as 44.6% of Smartwatches.
Show more
What reviewers say
Operating system
Proprietary OS
This smartwatch runs Proprietary OS, which is less advanced than the system in 54.2% of Smartwatches and equal to 42% of Smartwatches.
Software update frequency
ended
This smartwatch has ended software update support which is less active than that of 46.1% of smartwatches and equal to that of 53.9% of smartwatches.
Third-party app support
no
This smartwatch does not support third-party apps. 51.6% of smartwatches support third-party apps.
Notifications
yes
This smartwatch supports notifications. 0.3% of smartwatches support notifications.
Voice assistant support
yes
This smartwatch supports voice assistants. 30.8% of smartwatches support voice assistants.
Show more
What reviewers say
Cellular module
no
This smartwatch does not include a cellular module. 16.7% of smartwatches include a cellular module.
SIM cards
0
GPS
no
This smartwatch does not support GPS. 59.8% of smartwatches support GPS.
Galileo support
no
This smartwatch does not support Galileo navigation. 43.6% of smartwatches support Galileo navigation.
Dual-frequency GPS
no
This smartwatch does not support dual-frequency GPS. 15.1% of Smartwatches offer this.
Show more
Screen size
1.39 inch
Market range: <1.2 inch – >1.83 inch
This smartwatch has a 1.39 inch screen, which is smaller than 51.3% of Smartwatches and the same as 9% of Smartwatches.
Display type
TFT LCD
This smartwatch uses TFT LCD, which is less advanced than the screen in 76.5% of Smartwatches and equal to 14.5% of Smartwatches.
Resolution
360x 360
This smartwatch has a display resolution of 360x360 which is higher than that of 47% of smartwatches and equal to that of 6.1% of smartwatches.
Pixel density
366 ppi
Market range: <213 ppi – >461 ppi
This smartwatch has a pixel density of 366 ppi, which is higher than 64.9% of Smartwatches and equal to 0.4% of Smartwatches.
Display brightness
600 nits
Market range: <450 nits – >2k nits
This smartwatch has a screen brightness of 600 nits, which is lower than 52.5% of Smartwatches and equal to 13.1% of Smartwatches.
Show more
What reviewers say
CPU speed
?
Processor model
?
RAM
?
Internal storage
0 GB
Market range: <0 GB – >32 GB
This smartwatch has 0 GB of internal storage, which is less than 76.5% of Smartwatches and equal to 23.5% of Smartwatches.
No local user storage for apps/media
External memory slot
no
This smartwatch does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
Show more
What reviewers say

Fire-Boltt Grenade vs the average smartwatch

246810TotalHealthFitnessBatteryConnectivityDisplay & DesignSmart featuresHardware
  • Blood pressure monitoring
    This smartwatch supports blood pressure monitoring, the average smartwatch does not. 21.8% of smartwatches support blood pressure monitoring.
  • Calorie tracking
    This smartwatch supports calorie tracking, the average smartwatch does not. 48.7% of smartwatches support calorie tracking.
  • Rugged construction
    This smartwatch has a rugged design, the average smartwatch does not. 41.2% of smartwatches have a rugged design.
  • 15.7% higher review score
    Reviews score
    8.1/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Every review counts the same: written or video, short or full test.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.4 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–² Better than 59% of models

    80%

    8.3

    Average grade

    20%

    7.7

    Popularity

    Grades by review (14)
    14 videos, average 8.4/10. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.1 vs 7.0
  • 33 more exercise types
    This smartwatch includes more exercise types than the average smartwatch (123 vs 90). The average smartwatch includes 90 exercise types.
    Reported as at least 123 exercise modes.
    123 vs 90
  • Water intake tracking
    This smartwatch tracks water intake, the average smartwatch does not. 44.1% of smartwatches track water intake.
  • Better band material
    This smartwatch uses silicone, stainless steel for the band material, while the average smartwatch uses silicone.
    silicone, stainless steel vs silicone
  • 2 years newer
    This smartwatch was released more recently than the average smartwatch (2023 vs 2021). The average smartwatch was released in 2021.
    June 2023
    2023 vs 2021
  • 15.7% higher review score
    Reviews score
    8.1/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Every review counts the same: written or video, short or full test.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.4 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–² Better than 59% of models

    80%

    8.3

    Average grade

    20%

    7.7

    Popularity

    Grades by review (14)
    14 videos, average 8.4/10. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.1 vs 7.0
  • 5.5x cheaper
    Fire-Boltt Grenade is cheaper than the average smartwatch (£20 vs £110).
    £20 vs £110
  • Blood pressure monitoring
    This smartwatch supports blood pressure monitoring, the average smartwatch does not. 21.8% of smartwatches support blood pressure monitoring.
  • Calorie tracking
    This smartwatch supports calorie tracking, the average smartwatch does not. 48.7% of smartwatches support calorie tracking.
  • Water intake tracking
    This smartwatch tracks water intake, the average smartwatch does not. 44.1% of smartwatches track water intake.
  • 2 years newer
    This smartwatch was released more recently than the average smartwatch (2023 vs 2021). The average smartwatch was released in 2021.
    June 2023
    2023 vs 2021
  • 33 more exercise types
    This smartwatch includes more exercise types than the average smartwatch (123 vs 90). The average smartwatch includes 90 exercise types.
    Reported as at least 123 exercise modes.
    123 vs 90
  • Rugged construction
    This smartwatch has a rugged design, the average smartwatch does not. 41.2% of smartwatches have a rugged design.
  • Better band material
    This smartwatch uses silicone, stainless steel for the band material, while the average smartwatch uses silicone.
    silicone, stainless steel vs silicone
  • Better case material
    This smartwatch uses stainless steel for the case material, while the average smartwatch uses polycarbonate.
    stainless steel vs polycarbonate
  • 28.4 mm narrower case
    This smartwatch has a narrower case than the average smartwatch (14.1 mm vs 42.5 mm). The average smartwatch measures 42.5 mm across.
    14.1 mm vs 42.5 mm
  • No VO2 max measurement
    This smartwatch does not measure VO2 max, the average smartwatch does. 51.3% of smartwatches measure VO2 max.
  • No GPS support
    This smartwatch does not support GPS, the average smartwatch does. 59.7% of smartwatches support GPS.
  • No third-party apps
    This smartwatch does not support third-party apps, the average smartwatch does. 51.6% of smartwatches support third-party apps.
  • More basic display
    This smartwatch uses a more basic screen than the average smartwatch (TFT LCD vs AMOLED).
    TFT LCD vs AMOLED
  • 49 m shallower water rating
    This smartwatch is rated for shallower water than the average smartwatch (1 m vs 50 m). The average smartwatch is rated to 50 m.
    1 m vs 50 m
  • No pace tracking
    This smartwatch does not support pace tracking, the average smartwatch does. 80.6% of smartwatches support pace tracking.
  • No coaching features
    This smartwatch does not support coaching, the average smartwatch does. 58.8% of smartwatches support coaching.
  • No distance tracking
    This smartwatch does not support distance tracking, the average smartwatch does. 96.3% of smartwatches support distance tracking.
  • 28.0% lower sentiment score
    5.4 vs 7.5
  • No VO2 max measurement
    This smartwatch does not measure VO2 max, the average smartwatch does. 51.3% of smartwatches measure VO2 max.
  • No smart scale support
    This smartwatch does not support smart scale compatibility, the average smartwatch does. 57.1% of smartwatches support smart scale compatibility.
  • No pace tracking
    This smartwatch does not support pace tracking, the average smartwatch does. 80.6% of smartwatches support pace tracking.
  • No distance tracking
    This smartwatch does not support distance tracking, the average smartwatch does. 96.3% of smartwatches support distance tracking.
  • No route tracking
    This smartwatch does not support route tracking, the average smartwatch does. 77% of smartwatches support route tracking.
  • No coaching features
    This smartwatch does not support coaching, the average smartwatch does. 58.8% of smartwatches support coaching.
  • No gyroscope
    This smartwatch does not include a gyroscope, the average smartwatch does. 71.2% of smartwatches include a gyroscope.
  • No auto-pause
    This smartwatch does not support auto pause, the average smartwatch does. 62.6% of smartwatches support auto pause.
  • No route support
    This smartwatch does not support route support, the average smartwatch does. 54.4% of smartwatches support route support.
  • Basic battery type
    This smartwatch uses a Li-ion battery, while the average smartwatch uses Li-Po.
    Li-ion vs Li-Po
  • No GPS support
    This smartwatch does not support GPS, the average smartwatch does. 59.7% of smartwatches support GPS.
  • No compass
    This smartwatch does not include a compass, the average smartwatch does. 56.7% of smartwatches include a compass.
  • More basic display
    This smartwatch uses a more basic screen than the average smartwatch (TFT LCD vs AMOLED).
    TFT LCD vs AMOLED
  • 49 m shallower water rating
    This smartwatch is rated for shallower water than the average smartwatch (1 m vs 50 m). The average smartwatch is rated to 50 m.
    1 m vs 50 m
  • No always-on display
    This smartwatch does not have an always-on display, the average smartwatch does. 70.3% of smartwatches have an always-on display.
  • Weaker ingress protection
    This smartwatch has weaker ingress protection than the average smartwatch (IP67 vs IP68).
    IP67 vs IP68
  • No ambient light sensor
    This smartwatch does not include an ambient light sensor, the average smartwatch does. 63.5% of smartwatches include an ambient light sensor.
  • 2.4 mm thicker
    This smartwatch is thicker than the average smartwatch (14.1 mm vs 11.7 mm). The average smartwatch is 11.7 mm thick.
    14.1 mm vs 11.7 mm
  • 4.5 mm taller case
    This smartwatch has a taller case than the average smartwatch (49.5 mm vs 45 mm). The average smartwatch is 45 mm tall.
    49.5 mm vs 45 mm
  • 150 nits dimmer screen
    This smartwatch has a dimmer screen than the average smartwatch (600 nits vs 750 nits). The average smartwatch peaks at 750 nits.
    600 nits vs 750 nits
  • 0.01 inch smaller display
    This smartwatch has a smaller screen than the average smartwatch (1.4 inch vs 1.4 inch). The average smartwatch has a 1.4 inch screen.
    1.39 inch vs 1.4 inch
  • 3 g heavier
    This smartwatch is heavier than the average smartwatch (48 g vs 45 g). The average smartwatch weighs 45 g.
    48 g vs 45 g
  • No third-party apps
    This smartwatch does not support third-party apps, the average smartwatch does. 51.6% of smartwatches support third-party apps.
  • No music playback
    This smartwatch does not support music playback, the average smartwatch does. 57.1% of smartwatches support music playback.

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

9.0
SB Digital
≈ estimated
24/07/2023
Long-term test · 20 days of daily use
Verdict
The Fire-Boltt Grenade is recommended as a budget rugged watch, though calling drains its battery quickly.
8.0
ANUPAM Dev official
≈ estimated
05/07/2023
Unboxing and full review · calling, sensor and battery tests
Verdict
Fire-Boltt Grenade is good value for a rugged round smartwatch, though its sensor readings are only a rough guide.
9.0
Venom's Tech
≈ estimated
02/07/2023
Hands-on review · build, features, UI and app walkthrough
Verdict
The Fire-Boltt Grenade has a sturdy build and good features for the price, but low screen brightness is its main drawback.
8.0
DAYbyDAY Tech
≈ estimated
01/07/2023
Unboxing and review · design, display, calling and health tests
Verdict
The Fire-Boltt Grenade is a budget rugged watch with calling and a good display, though its health readings are only a rough guide.
8.0
AB Tech Vlog
≈ estimated
30/06/2023
Unboxing and full review · features, sensors and interface
Verdict
The Fire-Boltt Grenade has a sturdy build and good value for the money, though notifications and sleep comfort are weak points.
9.0
Techno Fire
≈ estimated
30/06/2023
Unboxing and hands-on review · health sensors and calling
Verdict
Fire-Boltt Grenade has a strong build and display for the price, among the best budget smartwatches in its category.
9.0
Tech Singh
≈ estimated
30/06/2023
Hands-on review · health, sports, app and calling tests
Verdict
The Fire-Boltt Grenade is a value-for-money rugged metal watch with good calling and a long sports list.
9.0
Blue Boy
≈ estimated
30/06/2023
Hands-on review · calling, display and interface tests
Verdict
The Fire-Boltt Grenade offers almost all the features for the price, with a premium feel, and the reviewer calls it a strong buy.
9.0
Tech Unboxing
≈ estimated
30/06/2023
Hands-on review · build, sensors, UI and battery
Verdict
The Fire-Boltt Grenade offers good value and a strong look, though its sensor readings vary depending on the surface.
8.0
Aman Dhingra
≈ estimated
30/06/2023
Hands-on review · design, calling and health tests
Verdict
The Fire-Boltt Grenade offers good looks and build for the price, but it lacks some expected features such as games and SMS replies.
9.0
Mahi The Techie
≈ estimated
29/06/2023
Hands-on review · calling, battery and heart-rate tests
Verdict
Fire-Boltt Grenade has a strong build and premium look, and it is competitive for its class, but heart-rate accuracy is weak.
7.0
TechnoAmmu
≈ estimated
08/07/2023
Hands-on review · features, sensors and calling test
Verdict
The Fire-Boltt Grenade is worth considering for its features and display, though it gets only a cautious recommendation.
More graded video reviews (1)
creator’s own scoreestimated by us

Third-party reviews

What customers like about Fire-Boltt Grenade

  • Premium rugged design with options for metal, CAMO, or silicone straps
  • Large and vibrant 1.39-inch HD display with 360x360 resolution
  • Reliable Bluetooth calling with high-quality speaker and microphone
  • Good battery life of up to 7-9 days with moderate usage
  • Extensive fitness features including 123 sports modes and SpO2/Heart Rate tracking
  • IP67 water resistance suitable for rain and daily activities
  • Great value for money at its price point

What customers don't like about Fire-Boltt Grenade

  • Strap adjustment for metal variants may require external tools not included in the box
  • IP67 rating does not support high-pressure water or deep submersion
  • Sensor accuracy is for general tracking and not medical-grade
  • Limited app ecosystem compared to high-end competitors like Apple or Samsung
  • Reports of poor customer service and slow warranty resolution times for the brand

Verdict

The Fire-Boltt Grenade is a rugged, affordable smartwatch featuring a 1.39-inch HD display with 360x360 pixel resolution and a sturdy metal body with shockproof protection. Key specifications include Bluetooth calling with a built-in speaker and microphone, a 350mAh battery offering up to 7 days of standard use, and support for 123 sports modes along with health monitoring for SpO2, heart rate, and sleep. Its main pros are the premium build quality, clear display, and reliable Bluetooth connectivity; however, cons include limited outdoor screen visibility due to its LCD panel, a lack of built-in GPS, and significantly reduced battery life (down to approximately 2 days) when Bluetooth calling is heavily used.

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