Technology:ingrared technology Function:laser pointer,page up /down,built in flash memory optional(64MB-16GB) Control dist Description:Technology:ingrared technologyFunction:laser pointer,page up /down,built in flash memory optional(64MB-16GB)Control distance:12mLaser output:<1mw(class ll),<5mw(class lll)Laser wavelength:650nmMaterial:plasticBattery:LR44*3Size:14.9*1.6cmUSB plug-and-play,no ...