Meet Fitbit Sense, the advanced health smartwatch that helps you tune in to your body and guides you toward better health. Assess your heart for atrial fibrillation (Afib) with a compatible ECG app right on your wrist, track & manage stress, better understand your sleep quality and even keep an eye on patterns in your skin temperature. Plus, Sense unlocks a 6-month Fitbit Premium membership for new users which includes personalized tools like Daily Readiness—so you can do what's best for your body.

EDA Scan App

The on-wrist EDA Scan app detects electrodermal activity--which may indicate your body's response to stress so you can better track and manage it.

ECG App

With a compatible ECG app right on your wrist, assess your heart for atrial fibrillation--a heart rhythm irregularity--and share the results with your doctor.1

On-wrist Skin Temperature Sensor

Sense logs your skin temperature each night to show how it varies from your personal baseline, so you can be aware of trends over time.2

Understand Your SpO2 Levels

See your nightly blood oxygen levels at a glance with our growing collection of SpO2 clock faces. Then use the Fitbit app to track your trends over time in the Health Metrics dashboard to see when there may be indications of important changes in your fitness and wellness.

6-month Fitbit Premium Included

Personalized health & fitness guidance with a 6-month Fitbit Premium membership for new Premium users.3

High & Low Heart Rate Notifications

Your heart rate is a key indicator of health, so stay informed when Sense detects that your heart rate is unusually high or low.

Built-in Voice Assistant

Use Google Assistant or Amazon Alexa Built-in to get quick news and weather, set bedtime reminders and alarms, control your smart home devices and more--just by speaking to yoru watch.4

Calls from Your Wrist

Use the built-in mic and speaker to take Bluetooth calls hands-free, send callers to voicemail and adjust volume. (Available when your phone is nearby. Requires more frequent charging.)

1 The Fitbit ECG app is only available in select countries, not intended for use by people under 22 years old.

2 Skin temperature variation not available in all markets. Only available in the Fitbit app and only displays variation. Significant changes in ambient temperature may negatively impact skin temperature tracking.

3 New and returning Premium members only. Must activate trial within 60-days of device activation (requires valid payment). This trial cannot be gifted. Cancel before end of trial to avoid recurring fees. Content and features may change. Terms & conditions apply.

4 Voice assistant availability and features may vary.

General

Product Name

Sense Advanced Health Smartwatch

Brand

Fitbit

Model Number

FB512BKBK

Model Family

Fitbit Sense

Series

Fitbit Sense

Color

Graphite

Color Category

Black

Voice Assistant Built-in

Google Assistant, Amazon Alexa

Global Positioning

GPS, GLONASS

Operating System Compatibility

Android, Apple iOS

Touch Screen

Yes

Metrics Measured

Heart rate, Pace, Distance traveled, Sleep quality, Temperature, Blood oxygen, Calories burned, Hours slept, Duration of exercise, Route, Stairs climbed, Steps taken

Screen Size

40 millimeters

Water Resistant

Yes

Maximum Depth of Water Resistance

164 feet

Band Material

Silicone

Series

Fitbit Sense

Compatibility

Voice Assistant Built-in

Google Assistant, Amazon Alexa

Feature

Mobile Notifications

Yes

Silent Alarm

Yes

Alert Type

Vibration, Visual

Features

Mobile Payment Service Supported

Fitbit Pay

Vibration Alert

Yes

Customizable Watch Faces

Yes

Built-In Microphone

Yes

Form Factor

Wristwatch

Product Type

Smartwatch

Performance

Water Resistant

Yes

Maximum Depth of Water Resistance

164 feet

Maximum Operating Temperature

113 degrees fahrenheit

Minimum Operating Temperature

14 degrees fahrenheit

Activity

Sensors

Accelerometer, Altimeter, Ambient light sensor, Heart rate sensor, Pulse oximeter (Sp02) sensor, Temperature sensor

Multi-Sport Tracking

Yes

Connectivity

NFC Technology

Yes

Wi-Fi Compatibility

Wireless B, Wireless G, Wireless N

Bluetooth Enabled

Yes

Power

Charging Interface(s)

USB

Battery Strength Indicator

Yes

Battery Type

Lithium-polymer

Charging Time

40 minutes

Rechargeable

Yes

Display

Clock Display

Yes

Display Type

AMOLED

Display Screen

Yes

Color Display

Yes

Adjustable Brightness

Yes

Screen Material

Corning Gorilla Glass 3

Backlit Display

Yes

Watch

Case Shape

Rounded square

Band Color

Carbon

Material

Case Material

Stainless steel

Dimension

Adjustable Band Length

Yes

Minimum Wrist Size

5.5 inches

Maximum Wrist Size

8.7 inches