1.62-inch AMOLED display at 60 Hz The Mi Smart Band 8 is a smart band that features a 1.62-inch OLED display with a resolution of 326 pixels per inch, just like its predecessor. The new feature is that it now includes a refresh rate of 60 Hz, a maximum brightness of 600 nits with automatic adjustment, and 200 watch face designs. 150 sports modes and water resistance up to 5 ATM The more than 150 sports modes of the Xiaomi band can help you track calories burned, changes in heart rate, and workout duration, among many other things. Additionally, the Mi Smart Band 8 is water-resistant up to 5 ATM, which means it can be used for swimming in a pool. Health tracking throughout the day Regarding health features, the Mi Smart Band 8 monitors SpO2, heart rate, and stress levels throughout the day. In this way, the band will vibrate to alert you to any abnormalities. Moreover, the Mi Smart Band 8 also offers sleep monitoring, menstrual cycle tracking, and breathing exercises. 190 mAh battery with up to 16 days of autonomy With a 190 mAh battery, the Xiaomi Smart Band 8 fitness tracker offers up to 16 days of typical use and up to 6 days with Always-On Display (AOD) mode activated. Features Product Color: Black Band Material: TPU Band Size: 135 - 210 mm Waterproof Rating: 5 ATM Connection: Bluetooth 5.1 BLE Compatible Devices: Android 6.0 or higher, iOS 12.0 or higher App: Mi Fit System Languages: English, German, Italian, French, Spanish, Russian, Traditional/Simplified Chinese, among others. PPG heart rate and SpO2 sensor 6-axis accelerometer Display Size: 1.62" (rectangular) Type: AMOLED touch display Resolution: 192 x 490p Density: 326 ppi Brightness: 600 nits (maximum), adjustable Material: Tempered glass with anti-fingerprint coating Battery Capacity: 190mAh Type: LiPo Autonomy (typical daily use): up to 16 days Charging Method: Magnetic Charging Time: Approximately 1 hour Product dimensions and weight Dimensions (with band): 48 x 22.5 x 10.99 mm Weight (with band): 27 g