Wireless optical mouse, green laser, USB mass storage(write protection), all in one. Direct supports from Canada office. Portable ... .Features:Wireless optical mouse funtionGreen Laser Mass USB storage is optional(1G~4G, USB write protection) Clock FunctionRemote page up and down, ... alarm)Control distance: up to 15 mCompatibility:Any computer with USB portWindows 98/2000/ME/XP, Vista, Linux, Mac ...