Adesso Tru-Form 4500 - 2.4GHz Wireless Ergonomic Touchpad Keyboard - Wireless Connectivity - RF - USB Interface - 105 Key - English (US) - TouchPad - Compatible with Computer (Windows) - Previous Track, Next Track, Play/Pause, Volume Up, Volume Down, Mute, Forward, Search, Wake-up, My Computer, Sleep, ... Hot Key(s) - Membrane: