Features It suit Windows XP Windows Vista and Windows 7 WINDOW 8USB interface receiverRed laser pen in most background can be easily seenUse distance for as long as 15 meters without interact with the audienceLCD battery power screenIntuition type slide control button can make you survey presentation materialButton a touch vestedThe design of the exterior of the smooth feel perfect achievement Specifications Model R800Interface USBConnectivity WirelessPower 5MW 2pcs AAA batteries Battery not included Laser Color GreenMaterial PlasticSize 13 5cm x 3 8cm 5 27 x 1 48in approx Color BlackPackage Included 1 x Viboton R800 Laser Pointer1 x USB Receiver