Integrated aluminum alloy chassis, scratch-resistant and corrosion-resistant\r\nDPI 3 file adjustment: 1000/1200/1600 DPI\r\nCharging input: 5V/500mA\r\nTracking system: optical\r\nWireless working channel: 16 automatic frame skipping\r\nWeight: about 85g\r\nWireless carrier frequency: 2402-2480MHz\r\nBuilt-in battery voltage: 3.7v\r\nConnection method: wireless (receiving head is connected via USB)\r\nSize: 111x63.5x34mm\r\nInterface: USB\r\nWireless transmission frequency: 2.4GHz