Fitbit Sense 2

Works with: iPhone and Android
Display: AMOLED
Case sizes: 40.5 mm
Battery: 6 days
GPS battery: 5 hours
Water resistance: 5 ATM
Weight: 37.64 g

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Fitbit Sense 2 at a glance

Battery

About a week

Up to 6 days in smartwatch mode. 5 hours with GPS.
GPS

Built-in GPS

No maps. Runs and rides without your phone.
Display

AMOLED

Always-on option.
Health

ECG on the wrist

Measures ECG, blood oxygen and skin temperature.
Phone & smart

iPhone and Android

Notifications from your phone.
Build

5 ATM water rating

37.64 g.

Fitbit Sense 2 full specifications

Overview

Brand	Google
Model	Sense 2
Series	Sense
Colours	Shadow Grey / Graphite Aluminum, Lunar White / Platinum Aluminum, Blue Mist / Soft Gold Aluminum

Platform & apps

Works with iPhone and Android phones.

Works with	iPhone and Android
Minimum iOS	iOS 16.4
Minimum Android	Android 11

Display

A bright, colourful screen that looks like a phone display.

Always-on option.

Display type	AMOLED
Colour display	Yes
Always-on display	Yes

Design & durability

A 40.5 mm case weighing 37.64 g.

Rated 5 ATM: fine for swimming laps and showers.

Case sizes	40.5 mm
Dimensions	40.5 x 40.5 x 11.2 mm
Thickness	11.2 mm
Weight (case)	37.64 g
Case material	Aluminum
Lens	Gorilla Glass 3
Band material	flexible material
Fits wrists	130-180 mm
Water resistance	5 ATM
Operating temperature	-10 to 45 °C

Battery

About a week: up to 6 days in smartwatch mode.

With GPS on, up to 5 hours. Makers test with their own settings, so treat these as best-case figures.

Battery (smartwatch mode)	6 days
Battery (GPS)	5 hours
All battery modes	Smartwatch: 6 days; GPS: 5 hours

GPS & navigation

Built-in GPS, so you can record runs and rides without your phone.

GPS	Built-in
Satellite systems	GPS, GLONASS

Health & sensors

A health-focused watch: it measures ECG, blood oxygen and skin temperature.

ECG availability can depend on your country.

Sensors	optical HR, ECG electrode, SpO2, skin temperature, accelerometer, gyroscope, ambient light, EDA
Heart-rate sensor	Multi-path optical heart rate sensor
Heart-rate tracking	24/7
ECG	Yes
Blood oxygen (SpO2)	Yes
Skin temperature	Yes
Stress tracking	Yes

Smart features

Notifications	Yes
Speaker	Yes
Microphone	Yes
Wi-Fi	None

Specs compiled from Google's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.