Fitbit Inspire 3 - Battery Life up to 10 days / Optical Heart rate Monitor / Vibration Motor Black

Features

Materials

The band is made of premium, comfortable silicone (similar to sports watches).
Fastens with a plastic buckle and tang.

Compatibility

Requires a Google account (fitbit.com/devices).
Fitbit app is compatible with most popular phones.
Setup on devices with:
Apple iOS 15 or higher.
Android OS 9 or higher (Google Fast Pair for Android users).
Syncing range: Up to 30ft.
Some features (e.g., smartphone notifications) may require Android 9+.
Syncing requires Bluetooth® LE and an internet connection.

Sensors & Components

3-axis accelerometer.
Optical heart rate monitor.
Vibration motor.
Red and infrared sensors for blood oxygen (SpO2) monitoring.
Ambient light sensor.

Water Resistance

Swimproof (water-resistant to 50 meters).
Recommended to dry the band after getting it wet for optimal skin comfort.

Heart Rate

Accuracy is influenced by physiology, device location, and different movements.

Band Size

Small: Fits wrist 5.4" - 7.6" in circumference.
Large: Fits wrist 7.6" - 8.7" in circumference.
Dimensions: 1.55" l x .73" w x .46" h.

Battery & Power

Battery life up to 10 days.
Lithium-polymer battery.
Charge time (0-100%): Two hours.
Radio transceiver: Bluetooth