Product information: Color: Black Interface: USB Product Size: 168*48 * 11mm Receiver: Nano style Interface: USB 2.0 Processor:( MCU)Sonix,2.4GHz wireless transmission mode, height up to 10m,RF mode: 2.4GHz GFSK transmit power <5dB Charging voltage: 4.4V to 5.25V Charging current: 300mA, standby current <50uA Operating voltage: 3.7V, work Current:<70mA. 83 Keys, 6-axis air mouse