LP437B Well tested and high quality red laser pointer with 3 buttons. 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 / Windows Server 2008/ Windows 7/Linux/Mac Function: indication，turning page， playing and suspending fuction，black screen function Battery : 1 × AAA Operating Range: 15 -20m Material: plastic Color of Laser: red   Package Details Weight: 129.47 g Size: 15.4*7.8*3.7 cm Package Includes 1 × Wireless Powerpoint Pointer 1 × Receiver 1 × Carrying Case 1 × AAA Battery 1 × User Manual