What's in the Box
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Fitbit Sense 2
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Classic Band (Small & Large)
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Charging Cable
Tech Specs
Colors
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Shadow Grey / Graphite Aluminum
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Lunar White / Platinum Aluminum
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Blue Mist / Soft Gold Aluminum
Size & Weight
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Dimensions: 1.59" x 1.59" x 0.44" (40.5 mm x 40.5 mm x 11.2 mm)
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Weight: 0.08 lb (37.64 g)
Battery & Power
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Battery life: 6+ days (varies by usage and features)
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Up to 5 hours with GPS
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Always-on display, SpO2, and cEDA sensor may require more frequent charging
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Recommended: charge every few days
Sensors & Components
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Optical heart rate sensor
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cEDA sensor for body response tracking
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ECG and EDA-compatible multipurpose electrical sensors (availability varies by country)
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SpO2, gyroscope, altimeter, 3-axis accelerometer
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Skin temperature sensor (variation only, not medical)
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Ambient light sensor, vibration motor
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Built-in GPS + GLONASS
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NFC, microphone, speaker (75dB SPL @ 10cm)
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WiFi (disabled)
Display
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AMOLED with Corning® Gorilla® Glass 3
Water Resistance
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Up to 50 meters. Dry band after use for best skin comfort.
Materials
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Aluminum case and buckle
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Flexible sport-style band
Band Sizes
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Small: Fits wrists 5.1"–7"
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Large: Fits wrists 6.5"–8.6"
Memory
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Stores 7 days of detailed motion data
Environment
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Operating temp: -14°F to 113°F
Device Requirements
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Google account required
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Fitbit app for setup and syncing
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iOS 16.4+
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Android 11.0+
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Bluetooth® LE, internet connection, and location permissions
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Sync range: up to 30 ft
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Some features may require Android 11+
