LP432B Well tested and high quality red laser pointer. Clearly visible in dark. Easy to use，only need to push the button then you can see many red beam.. The features plug-and-play convenience with no software to install—just plug the receiver into the USB port of a PC and the remote is ready to use within seconds. The light can point at any targets，blackboard， video monitor and so on. It comes with a battery， a convenient pouch for carrying the remote and receiver while traveling. System Support: Window XP/ Window Vista/Linux Function: indication，turning page Battery: 1 × AAA Operating Range: 10-15m Material: plastic Color of Laser: red   Package Details Weight: 117.70 g Size: 15.4*7.8*4 cm Package Includes 1 × Wireless Powerpoint Pointer r 1 × Carrying Case 1 × AAA Battery 1 × User Manual