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Fitbit Sense 2 Graphite/Graphite
FB521BKGB-FRCJK
$445
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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 16 reviews
88% of users recommend this product
What customers say, summarised by AI
- Stylish design with extensive health and fitness tracking features
- Setup assistance praised, but initial navigation can be challenging
- Fabric straps difficult to source; most models come with uncomfortable silicone
- Reliable performance and step tracking, but some users experienced syncing failures
- Easy to use and install, better user experience compared to previous Fitbit models
- Features like ECG and community resources seen as valuable additions
Pros
Easy (3)
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.
Awesome watch
Great easier watch to use than the versa 2. Not a big fan of the silicone strap though
Tish
Confirmed purchase 26 May 2023
Published on 10 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 16 reviews
ABOUT THE GOOD GUYS REVIEWS
The 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 is a premium fitness tracker smartwatch for people who want deeper health insights, stress tracking and strong sleep tools in a lightweight design. It suits wellness-focused users who want all-day comfort and useful smart features. Key strengths include stress monitoring, sleep analysis and heart health tools. One limitation is that it is less app-rich and versatile than full smartwatches.
What it’s great for
- Health Tracking
- Sleep Monitoring
- Stress Management
- Everyday Fitness
- Daily Smart Notifications
Where it works best
- Home
- Gym
- Outdoor Walks
- Daily Commute
- Workplace
Who it’s for
- Health-Conscious Adult
- Everyday Exerciser
- Busy Professional
- Sleep-Focused User
- Wellness Beginner
Things to consider
It offers strong health and wellness tracking, but it is less flexible than premium full smartwatches for third-party apps and broader smartwatch customisation.
Beginner vs athlete fit
Best for beginners to intermediate fitness users and wellness-focused buyers rather than specialist athletes chasing advanced training metrics.
Health monitoring depth
9/10 - strong health focus with stress sensing, sleep tracking, SpO2, heart rate variability and ECG support.
Smartphone compatibility
Works with compatible smartphones and supports notifications, Bluetooth calls and texts, Alexa, Google Maps and Google Wallet.
Battery endurance rating
7/10 - suited to day-and-night tracking, though battery life can vary depending on smart features and monitoring usage.
Water resistance score
7/10 - suitable for everyday wear and fitness use, but this product data does not confirm deeper specialist water-sports positioning.
Key benefits
- Continuous EDA Sensor: helps detect signs of stress throughout the day so you can respond with breathing sessions, exercise or other calming habits.
- cEDA Body Response Tracking: highlights possible signs of excitement, stress and other body responses to help you better understand what affects your day.
- Sleep Profile: provides a personalised monthly sleep analysis to help you spot patterns and improve your nightly routine.
- Sleep Stages and Sleep Score: shows light, deep and REM sleep data in a simple format so it is easier to gauge sleep quality.
- Heart Health Monitoring: tracks heart rate variability and supports ECG rhythm checks for more informed wellness monitoring.
- SpO2 Tracking: lets you monitor blood oxygen trends alongside other health metrics for a broader picture of recovery and wellbeing.
- Lightweight Thin Design: stays comfortable for all-day wear, workouts and overnight sleep tracking.
- Smartwatch Essentials: adds practical daily tools such as Bluetooth calls and texts, smartphone notifications, Alexa, Google Maps and Google Wallet.
Q: How can I identify this Fitbit Sense 2 model when comparing listings?
A: This model is the Fitbit Sense 2 in Graphite/Graphite, product code FB521BKGB-FRCJK. When comparing listings, match the Sense 2 name and FB521 model prefix, because older Sense and Versa models can look similar but use different sensors and features.
Q: Is the Fitbit Sense 2 still supported in Australia?
A: Yes. The Fitbit Sense 2 is still a supported Fitbit model and works with the Fitbit app in Australia. It also supports features listed for this watch, such as notifications, Bluetooth calling, Google Maps and Google Wallet, when paired with a compatible phone.
Q: Do you need a Fitbit Premium subscription to use the Sense 2?
A: No. The Sense 2 can track activity, sleep, stress and key health metrics without a Fitbit Premium plan. Premium adds deeper reports and some guided content, so the watch remains usable on its own if ongoing subscription cost is a concern.
Q: Can the Fitbit Sense 2 take calls and reply to texts from the watch?
A: Yes, but with limits. Sense 2 supports on-wrist Bluetooth calls and phone notifications when your phone is nearby, while message reply options depend on the phone. Android generally offers more reply features than iPhone.
Q: How is the Fitbit Sense 2 different from a full smartwatch?
A: The Sense 2 is built more for health tracking than for a broad app ecosystem. It includes Alexa, Google Maps, Google Wallet, calls, texts and notifications, but it has fewer third-party apps and less phone-style flexibility than an Apple or Samsung watch.
Q: Can the Fitbit Sense 2 measure ECG and blood oxygen levels?
A: Yes. Sense 2 can track blood oxygen trends and includes an ECG app for checking heart rhythm for signs of atrial fibrillation. These tools are for wellness monitoring and spot checks, not continuous diagnosis or a substitute for medical care.