Fitbit Sense 2

What's in the Box

• Fitbit Sense 2

• Classic Band (Small & Large)

• Charging Cable

Tech Specs

Colors

• Shadow Grey / Graphite Aluminum

• Lunar White / Platinum Aluminum

• Blue Mist / Soft Gold Aluminum

Size & Weight

• Dimensions: 1.59" x 1.59" x 0.44" (40.5 mm x 40.5 mm x 11.2 mm)

• Weight: 0.08 lb (37.64 g)

Battery & Power

• Battery life: 6+ days (varies by usage and features)

• Up to 5 hours with GPS

• Always-on display, SpO2, and cEDA sensor may require more frequent charging

• Recommended: charge every few days

Sensors & Components

• Optical heart rate sensor

• cEDA sensor for body response tracking

• ECG and EDA-compatible multipurpose electrical sensors (availability varies by country)

• SpO2, gyroscope, altimeter, 3-axis accelerometer

• Skin temperature sensor (variation only, not medical)

• Ambient light sensor, vibration motor

• Built-in GPS + GLONASS

• NFC, microphone, speaker (75dB SPL @ 10cm)

• WiFi (disabled)

Display

• AMOLED with Corning® Gorilla® Glass 3

Water Resistance

• Up to 50 meters. Dry band after use for best skin comfort.

Materials

• Aluminum case and buckle

• Flexible sport-style band

Band Sizes

• Small: Fits wrists 5.1"–7"

• Large: Fits wrists 6.5"–8.6"

Memory

• Stores 7 days of detailed motion data

Environment

• Operating temp: -14°F to 113°F

Device Requirements

• Google account required

• Fitbit app for setup and syncing

  • iOS 16.4+

  • Android 11.0+

  • Bluetooth® LE, internet connection, and location permissions

• Sync range: up to 30 ft

• Some features may require Android 11+