1) Unlimited Bluetooth 2.0 interface 2) Comfortableness and ergonomic design 3) Unique super energy-saving mode makes the battery life 50% longer than that of similar products 4) Unique power management software will make power be automatically displayed in the system 5) Using the industry-leading Bluetooth software solution 6) Built-in software solution, Bluetooth man-machine interface equipment, and Bluetooth 2.0 of the Bluetooth SIG complying with the standard version 7) To work in windows operating systems: Windows 2000/server 2003/XP/vista/MAC 8) Band: the ISM band of 2.4-2.4835 GHz 9) Receiving sensitivity: -75dBm 10) RF output power: up to 4dBm 11) Operating distance: 10 meters 12) Operating temperature: -10~50℃ 13) Workable environment: 0~55℃ 14) Humidity: 20%-50% 15) Built-in lithium battery