Power Mode: USB ChargingOperating Voltage: ≤36VBattery Properties: Rechargeable BatteryBattery Capacity (mAh): 55Rechargeable Battery: Lithium Battery-PolymerWireless Property: WirelessWireless Version: Wireless 5.2Water Resistance Level: IP68Screen Material: OtherBody Material: MetalWatch Chip: 8762ESF