... which has optical mouse function,can be used free This is a style of PC remote controller ... (Media Player) 3. Optical Mouse( 360omove,use free)4. Phase 1 buttons: page up, down, left, right, F5, B ... ,Esc and laser point. 5. Phase 2 buttons: play, pause, ... Flash have write-protect fuctionFeature:U USB plug-and-play. No driver required.System: WINDOWS98/2000/ME/XP ...