App: WearproBluetooth: Dual Bluetooth 5.0Compass: SupportProduct process zinc alloy+IMLScreen size: 1.463 inch TFT high-definition round screenScreen resolution: 360 * 360Screen type: IPS full angle color screenScreen material: explosion-proof tempered glassTotal length of wrist strap: 210 millimetersWrist strap material: siliconeHead size: 44 * 9.9Band size: Band width 22MMBattery type: Lithium batteryBattery model: 402230 polymerBattery voltage: 3.8VBattery capacity: 270mAhBattery life: 5-6 days of normal connection and 25-35 days of standby. (Connection usage depends on personal usage)Charging method: magnetic suction chargingCharging time: about 3.5 hours