Fitbit Sense 2 Smartwatch

Explore the specs.

What's in the box

Fitbit Sense 2
Classic band (small & large)
Charging cable

Tech Specs

Colours

Shadow Grey / Graphite Aluminum
Lunar White / Platinum Aluminum
Blue Mist / Soft Gold Aluminum

Dimensions and weight

Length: 1.59 in (40.5 mm)
Width: 1.59 in (40.5 mm)
Height: 0.44 in (11.2 mm)
Weight: 0.08 lb (37.64 g)

Battery & Power

Battery life of 6+ days. Battery life and charge cycles vary with use, settings and other factors; actual results will vary. Use of the always-on display, SpO2 and the cEDA sensor will require more frequent charging. Up to 5 hours with continuous GPS. We recommend charging your tracker every few days to ensure you are always tracking.

Memory

Saves 7 days of detailed motion data, minute by minute

Environmental Requirements

Operating temperature: -10° to 45° C

Sensors & Components

  • Multi-path optical heart rate sensor
  • Electrical sensor to measure skin conductance (cEDA) for body response tracking
  • Multipurpose electrical sensors compatible with ECG app & EDA app. ECG not available in all countries.
  • Red and infrared sensors for oxygen saturation (SpO2) monitoring. Not available in all countries. Not intended to diagnose or treat any medical condition or for any other medical purpose. Intended to help you manage your well-being and keep track of your information. Requires more frequent charging.
  • Altimeter
  • 3-axis accelerometer
  • Skin temperature sensor. Only available in the Fitbit app and only displays variation. Not available in all markets. Not intended for medical purposes. Significant changes in ambient temperature may negatively impact skin temperature tracking.
  • Ambient light sensor
  • WiFi (deactivated, cannot be turned on)
  • NFC
  • Built-in GPS + GLONASS
  • Vibration motor
  • Speaker (75dB SPL @10cm)
  • Microphone

Display

  • AMOLED display
  • Corning® Gorilla® Glass 3

Water resistance

Water resistant to 50m. After getting the band wet, we recommend drying the band because, as with any wearable device, it's best for your skin if the band is clean and dry. Learn more.

Materials

This watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminium watch case and buckle.

Band size

Both small and large sizes included in box.
  • Small: Fits wrist 130mm - 180mm in circumference
  • Large: Fits wrist 165mm - 220mm in circumference

Safety Information

Safety & Regulatory Documentation

Requirements

Google account will be required. Learn more.

The Fitbit app is compatible with most popular phones. To set up and use your Fitbit products and services, you must install the Fitbit app on a compatible device running one of the following operating systems:

  • Apple iOS 16.4 or higher.
  • Android OS 10 or higher. See additional tips for Android phones here.
  • Syncing range: Up to 30ft
  • Certain features like smartphone notifications may require Android 10+. Check your device compatibility.
  • Syncing requires Bluetooth® LE, an internet connection and location permissions granted on the phone