This RF wireless keyboard with the combination of radio wireless wheel mouse will provide the cordless convenience that you will really appreciate . Equipedd with reliable digital reliable radio technology . this wireless keyboard and mouse can be used at any tangle to the receiver . you'll never have to point the device to the receiver . Even if your PC is under the desk or out of sight , the device can work perfectly .To maximize the battery life , the device will shut off automatically and go into sleep mode after 30 seconds of idless . Keyboard : 104/105/ keys basic enhanced Windows layout Provide 15 Internet/Media hot key. 3V DC, two AA batteries Power consumption: 35 mA Dimensions: 455 x190 x 22 mm Use Range: Works up to 6 feet away from the receive Provide 15 Internet/Media hot key. Mouse: Power consumption: 35 mA Dimensions: 455(L) x190 (W )x 22 (H) mm Use Range: Works up to 4 feet away from the receiver 3V DC, 3 AAA batteries. 3 buttons + 1 wheel, 400 dpi hardware high resolution ( 800dpi ) Power consumption: 45 mA Receiver: Receiver LED indicator: will flash during mouse operation or keyboard operation. Dimensions: 103 x 69 x 15 mm Interface: USB+ps2 System Requirement: IBM or Compatible, Windows 95, 98, NT4.0, ME, 2000, XP