2.4GHz RF Wireless Keyboard& Mouse Combo Features: 2.4GHz RF wireless project. Adopted interference avoidance technology, enabling co-location of hundreds of wireless keyboard& mice without any interference. Brand new and ergonomic design. Receiver with charging function. Working radius: over 10 metres. Connection( for receiver): USB port. Keyboard: 105 professional notebook style keys and ultra slim design. 5 hot keys for multimedia player. Low power consumption: 7mA/ hour. With 2*AAA alkaline batteries. Size: 415*73*26MM. Mouse: wireless optical mouse. Precise optical navigation technology, smooth and accurate 800dpi resolution With 2*AA batteries