Fitbit Sense 2 Smartwatch

Explore the specs.
What's in the box
Fitbit Sense 2
Classic band (small & large)
Charging cable
Fitbit Sense 2
Classic band (small & large)
Charging cable
Tech Specs
ColorsShadow Grey / Graphite Aluminum
Lunar White / Platinum Aluminum
Blue Mist / Soft Gold Aluminum
Dimensions and weightLength: 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 and powerBattery 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.
MemorySaves 7 days of detailed motion data, minute by minute
Environmental requirementsOperating temperature: -14° to 113°F
Sensors and 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.
  • Gyroscope
  • 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 resistanceWater 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.
MaterialsThis watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminum watch case and buckle.
Band sizeBoth small and large sizes included in box.
  • Small: Fits wrist 5.1 - 7 inches in circumference
  • Large: Fits wrist 6.5 - 8.6 inches in circumference
ColorsShadow Grey / Graphite Aluminum
Lunar White / Platinum Aluminum
Blue Mist / Soft Gold Aluminum
Dimensions and weightLength: 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 and powerBattery 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.
MemorySaves 7 days of detailed motion data, minute by minute
Environmental requirementsOperating temperature: -14° to 113°F
Sensors and 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.
  • Gyroscope
  • Altimeter
  • 3-axis accelerometer
  • Skin temperature sensor.