Hittime 2.4G 800/1600 DPI Wireless USB Wheel Optical Mouse PC 2.4GHz Wireless technology to provide furthest 10 meters from the operation. Reliable and receiver-free wireless connection. Mini receiver plug and play. Optical sensor up to 800/1600 dpi. On/Off switch maximizes battery life. Switchable dpi among 800/1600. Features comfortable, ergonomic design. 16 wireless working channels, automatic frequency jumping. Low-voltage alarming function. Mouse built-in memory, the replacement of the batteries do not have re-code. Rated working voltage: 1.5V. Rated working current 15mA. Powered by 1 x AA battery. Color: Black.