Weight 22. 5g without strap Dimension 46*33. 35*9. 99mm Display type AMOLED Screen size 1. 74” Resolution 336 x 480, 336 PPI Screen brightness Up to 600 nit Ambient light sensor Yes Water resistant level 5 ATM Wrist strap material TPU Wireless connectivity BT 5. 3+BLE Sensors 3-axis accelerometer + 3-axis gyroscope sensors PPG sensor, 4-channel monitoring channel Battery LiPo, 289mAh Standby time 14 days for normal use 6 days AOD use Charging time About 80 min System requirements Android 6. 0,iOS12 or above Supported App Mi Fitness Package contents Xiaomi Smart Band 8 Pro x1 User guide x1 Charging cable x1  .