Features: RF carrier: 2402-2480MHz RF operation channel: 16, auto frequency hopping USB: USB 2.0 Operation systems: Windows 2000, Me, XP, Vista, Win 7 Power: 2 x AAA battery (not included) Rated operation current: 15mA, 1.5V 3-level power saving mode: 1) No action in 1 second - turn to rest mode 2) No action in 8 minutes - turn to sleep mode 3) Receiver unplugged or computer off - turn to off mode Usb plug and play Size: 113*59*20mm  

Package Includes: