High Quality， Compact Design， Palm-sized dimensions (124 x 135 x 25mm) Weight: 107gMini wireless keyboard with touchpad，USB Nano dongle2.4GHz radio frequency， Windows multimedia control，As far as 10 meters control distanceBuilt in Windows multimedia control is an added feature for faster use in the handy keyboard， is particularly suitable for HTPC.Compatible with Windows Me， 2000， XP， Vista， 7 and Mac OS，System Requirement: Windows 2000， XP， Vista ， Windows CE， Windows 7 Linux (Debian-3.1， Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested) 3.Mac OS， Symbian S60 Android OS(2.2 or above)