... your presentation. WLGP -008 uses green laser (532nm laser) as the pointer, which is much brighter than red laser. WLGP-008 use optical mouse ... USB write protection) Clock FunctionRemote page up and down, left, right, F5, B, ESC and laser pointer key.Play, pause, forward, backward, ... down alarm)Control distance: up to 15 mCompatibility:Any computer with USB portWindows 98/2000/ME/XP, Vista, Linux, Mac ...