Fitbit Sense 2 FB521BKGB Smart Watch - Shadow Grey/Graphite
£149.17
Key Features
- -10 - 45 °C Operating Temperature
- 129 - 209 Wrist Size Range
- 144 Hours Battery Life (max)
- 2 Hours Full Charge Time
- 5 ATM Water Resistant Rating

Fitbit Sense 2 FB521BKGB Smart Watch - Shadow Grey/Graphite
£149.17
Ex VAT
Back in stock soon
This one flew off the shelves. But you haven't missed out, it's coming back!
Key Features
- -10 - 45 °C Operating Temperature
- 129 - 209 Wrist Size Range
- 144 Hours Battery Life (max)
- 2 Hours Full Charge Time
- 5 ATM Water Resistant Rating
Product Specification
Key Information
Band Colour
Black
Battery Life
6 Hours
Blood Oxygen Measurement
Yes
Blood Pressure
Yes
Built-in Speaker
Yes
Call Notifications
Yes
Case Type
Graphite Aluminium
Display Type
Digital
Full Charge Time
2 Hours
Gender
Unisex
Heart Rate Sensor Type
Optical
Ideal For
Smartwatch
Mobile Network Connection
No
Mobile Operating Systems Supported
Apple iOS 15 or higher, Android OS 10 or higher
Shape
Square
Vibrating Alerts
Yes
Waterproof
Yes
Design
Closure
Single prong strap buckle
Customisable Watch Faces
Yes
Protection Features
Water resistant
Strap Material
Classic Band
Watch Case Colour
Black
Water Resistant Rating
5 ATM
Waterproof Depth
50 m
Wrist Size Range
129 - 209
Features We Love
Always-On Display
Yes
Bluetooth Smart (Low Energy)
Yes
Colour Screen Display
Yes
NFC
Yes
Smartphone Notifications
Yes
SMS Notifications
Yes
Voice Assistant Technology
Amazon Alexa
Water Resistant
Yes
Works With Amazon Alexa
Yes
Fitness and Tracking
Activity Tracker
Yes
Calorie Tracking
Yes
Distance Tracking
Yes
Fitness Tracking
Yes
Sleep Tracking
Yes
Product Detail
Alarm Clock
Yes
Brand
Fitbit
Case Material
Aluminium
Category
Smart Watches
Colour
Shadow_Grey_Graphite
Country Of Origin
United Kingdom
Dimensions
(H)0.0 x (W)9.1 x (D)17.6
SKU
FB521BKGB
Strap Size
S/L
Customer Reviews
5 / 5
Showing 2 of 2 reviews
5/5
Great watch would recommend good fitness app keeps an eye on your heart beat great love it thank you AO great company would recommend to anyone
Collette langford
Outstanding product with great battery life and features!
5/5
Fantastic product. I've synced mine with my Google pixel 8 pro and it acts extremely similar to a smart watch. It's comfortable, light, battery life is looooong, will easily go a week. Bought my wife one too, now we can compete against each other ??
Billy
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