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Fitbit Sense 2 Graphite/Graphite
FB521BKGB-FRCJK
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Product Overview
Key Features
- Smart watch with 1.58 Inch AMOLED display
- Heart rate, ECG, SpO2, sleep and stress tracking
- Up to 6 plus days battery life, fast charging
- Bluetooth 5.0, water resistant, GPS enabled
Key Specifications
- Brand:
- Fitbit
- Model Number:
- FB521BKGB-FRCJK
- Compatible Phones:
- Apple iOS 16.4 or higher, Android OS 11.0 or higher, Certain features like smartphone notifications may require Android 11+
- Face Size (mm):
- 40
- Display:
- AMOLED with Corning Gorilla Glass 3
- GPS:
- GPS + GLONASS
Phones & Wearables
- Strap:
- Small band fits wrists 5.1 - 7 inches, Large band fits wrists 6.5 - 8.6 inches in circumference
Screen Technology
- Display Resolution (px):
- 336 x 336
Capacity
- Storage Capacity:
- 4GB
- Memory:
- Tracks 7 days of minute by minute activity data
Connections
- Connections:
- Bluetooth v5.0
Power & Charging
- Battery Life:
- Up to 6 Days
Options
- Sensor Technology:
- Multi-path optical heart rate sensor, Electrical sensor for skin conductance (cEDA) compatible with ECG app & EDA app, Red and infrared sensors for oxygen saturation (SpO2), Gyroscope, Altimeter, Accelerometer
- Trackers:
- Sleep Mode & Profile, Smart Wake, Stress Management Score, ECG App, Health Metrics, Daily Readiness Score
Audio
- Audio:
- 75dB SPL 10cm Speaker & Microphone
Safety
- Water Resistant:
- Up to 50m (swimproof)
General Information
- Type:
- Smart Watch
- Family:
- Sense 2
- Colour:
- Grey
- Supplier Colour:
- Graphite/Graphite
- Band Colour:
- Grey
- Materials:
- Aluminum watch case and buckle
- Additional Features:
- Vibration motor, 40+ Exercise Modes, Built-in Alexa Voice Assistant, Google Wallet
- What's In The Box:
- Classic bands (small & large), Charging cable
Warranty
- Manufacturer's Warranty:
- 2 Year
Phones & Wearables
- Strap:
- Small band fits wrists 5.1 - 7 inches, Large band fits wrists 6.5 - 8.6 inches in circumference
Capacity
- Storage Capacity:
- 4GB
- Memory:
- Tracks 7 days of minute by minute activity data
Power & Charging
- Battery Life:
- Up to 6 Days
Audio
- Audio:
- 75dB SPL 10cm Speaker & Microphone
General Information
- Type:
- Smart Watch
- Family:
- Sense 2
- Colour:
- Grey
- Supplier Colour:
- Graphite/Graphite
- Band Colour:
- Grey
- Materials:
- Aluminum watch case and buckle
- Additional Features:
- Vibration motor, 40+ Exercise Modes, Built-in Alexa Voice Assistant, Google Wallet
- What's In The Box:
- Classic bands (small & large), Charging cable
Product Dimensions
- Product Height (mm):
- 11.2
- Product Width (mm):
- 40.5
- Product Depth (mm):
- 40.5
- Product Weight (g):
- 37.6
Box Dimensions
- Box Height (mm):
- 66
- Box Width (mm):
- 177
- Box Depth (mm):
- 91
- Box Weight (kg):
- 0
Product Reviews of Fitbit Sense 2 Graphite/Graphite
Overall Rating Snapshot
4.6 out of 5 stars from 17 reviews
88% of users recommend this product
What customers say, summarised by AI
- Offers impressive sleep tracking and customisable insights
- Setup is straightforward with helpful in-store staff support
- Navigation can be tricky at first, but help resources are useful
- Extensive health features including ECG and community support
- Strap comfort is a concern; fabric options are difficult to find
- Some users experienced severe syncing and reliability issues
Pros
Easy (3)
Fitness
Fantastic very intuitive and can be adjusted to suit sleep scores are amazing
Brian
Confirmed purchase 15 July 2026
Published on 12 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Perfect
Very pleased with new watch and your staff member set it up perfectly - Did a wonderfull job
Elizabeth Lee
Confirmed purchase 20 June 2026
Published on 15 July 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Good product
Difficult to first navigate but help section is good
Debra
Confirmed purchase 8 March 2026
Published on 4 April 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Stylish watch
Great watch Lots of features. Stylish Tracks steps.
Kerrie Hoare
Confirmed purchase 12 December 2025
Published on 7 January 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
awsome device
great unit
alex
Confirmed purchase 20 September 2025
Published on 22 December 2025
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Smart watch
Worth for money
gaurav sharma
Confirmed purchase 8 October 2025
Published on 5 November 2025
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Fitbit Sense 2
Happy with the watch/pulse
David
Confirmed purchase 15 January 2025
Published on 12 February 2025
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Excellent features
Easy to install and use
Colin
Confirmed purchase 27 December 2024
Published on 22 January 2025
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Love my new Fitbit Sence 2 . Easy to use
Tina
Confirmed purchase 20 December 2024
Published on 15 January 2025
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Great watch
Not a fan of the silicone strap, difficult to find a fabric strap for this watch though. Features are great. Easy to work and download info
Tish
Confirmed purchase 26 May 2023
Published on 18 June 2023
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
You've viewed 10 of 17 reviews
ABOUT THE GOOD GUYS REVIEWSThe Good Guys product reviews are collected from verified purchasers who may have received an incentive in return for providing an authentic review.
The below information is AI generated based on Australian websites information around this item. We have done our best to ensure its accuracy but suggest verifying any information within this tab before purchasing.
At a glance
The Fitbit Sense 2 Graphite/Graphite is a wellness-focused fitness smartwatch for people who want deeper health tracking than a basic activity band. It stands out for stress, sleep, heart rate and GPS workout monitoring in a light, swim-friendly design. Built-in Alexa, Google Wallet and phone-linked notifications add daily convenience. The main limitation is that battery life and sports depth are not as strong as some specialist adventure or premium training watches.
What it’s great for
- Daily Health Tracking
- Sleep Monitoring
- Stress Tracking
- General Fitness
- Walking and Running
- Swim Tracking
- Everyday Smartwatch Use
Where it works best
- Home
- Gym
- Pool
- Office
- Outdoor Walks and Runs
- Daily Commute
Who it’s for
- Health-Conscious Adults
- Everyday Exercisers
- Beginner Fitness Users
- Wellness-Focused Users
- Busy Professionals
Things to consider
It offers strong everyday wellness tracking, but serious athletes may want a sport-focused watch with longer battery life, broader training metrics and more advanced performance tools.
Beginner vs athlete fit
Best for beginners to intermediate fitness users and wellness-focused wearers; less suited to dedicated athletes needing advanced training analytics.
Health monitoring depth
9/10 - strong wellness coverage with heart rate, sleep, stress and oxygen saturation sensors.
Smartphone compatibility
Apple iOS 16.4 or higher, Android OS 11.0 or higher
Battery endurance rating
8/10 - up to 6 days is strong for everyday use, though below some longer-lasting sport watches.
Water resistance score
8/10 - 50 m water resistance is well suited to swimming and daily wear.
Key benefits
- Heart Rate Tracking: Multi-path optical heart rate monitoring helps you follow day-to-day effort, recovery and overall wellness trends.
- Stress Monitoring: Electrical sensors for skin conductance support more detailed stress tracking than basic fitness bands.
- Sleep Tracking: Tracks sleep to help users understand nightly rest patterns and build healthier routines.
- Built-in GPS + GLONASS: Records outdoor workouts with location tracking without relying entirely on your phone.
- Water Resistance 50 m: Suitable for swimming and everyday wear around water.
- Battery Life Up to 6 Days: Reduces charging frequency for more consistent everyday wear.
- 40+ Exercise Modes: Gives users a wide range of activity options to better match their fitness routine.
- Lightweight 0.038 kg Design: Comfortable for all-day wear, including sleep tracking and workouts.
Q: Can Fitbit Sense 2 make calls or texts without your phone nearby
A: No. Fitbit Sense 2 can show call and text features only when it is connected to a nearby compatible phone over Bluetooth. It suits notifications on the go, but it is not a standalone cellular watch for untethered calling or messaging.
Q: Will Fitbit Sense 2 suit serious training or everyday wellness tracking
A: Fitbit Sense 2 is aimed more at everyday wellness tracking than deep performance analysis. It covers heart rate, sleep, stress, GPS workouts and 40+ exercise modes, but serious endurance users may want more advanced training and recovery detail.
Q: Does Fitbit Sense 2 have built in GPS for phone free runs
A: Yes. Fitbit Sense 2 has built-in GPS plus GLONASS, so it can record outdoor route and distance data during runs or walks without using your phone. Phone pairing is still needed for setup, syncing, notifications and connected smart features.
Q: How often will Fitbit Sense 2 need charging in normal use
A: Fitbit Sense 2 lasts up to 6 days between charges in typical mixed use, so it should not need nightly charging. Battery life will be shorter when features such as GPS, notifications and the always-on display are used more often.
Q: Is Sense 2 suitable for swimming or just splash resistance
A: Yes. Fitbit Sense 2 is water resistant to 50m, so it is suitable for pool swimming and everyday water exposure. That rating does not make it a dive watch, so it is better suited to laps and general wear around water than underwater depth use.
Q: What wrist size does the Fitbit Sense 2 band fit
A: Fitbit Sense 2 fits wrists from 5.1 to 8.6 inches, which covers many smaller and larger adult fits. That range is useful if you plan to wear it overnight, but buyers outside it may need a different band option rather than forcing the included fit.