• Memory: Saves 7 days of detailed motion data, minute by minute, Saves daily totals for the last 30 days, Stores heart rate data at 2-second intervals
• Battery and power: Battery life of up to 7 days. We recommend charging your tracker every few days to ensure you are always tracking. Battery type: Lithium-polymer, Charge time (0-100%): 90 min, Quick Charging: 1 day of battery life in 5 min, Radio transceiver: Bluetooth 5.0
• Materials: The Fitbit Air housing is made of recycled polycarbonate and PBT plastics.2 The band is made of textile and has a stainless steel buckle. Packaging uses 100% plastic-free materials.
• Sensors & components: Optical heart rate monitor, 3-axis accelerometer + gyroscope, Red and infrared sensors for oxygen saturation (SpO2) monitoring, Device temperature sensor (skin temperature variation available in the Google Health app), Vibration motor