August LP180B: This wireless presenter with laser pointer and mouse allows you to control your computer from up to 15 meters (48 feet) away, using a Radio Frequency (RF) transmitter that doesn’t require line of sight to your PC. With its in-built laser pointer, the L P 180B is the ideal tool for presentations, teaching, meetings, speeches, training etc. It features a wireless trackball mouse, red laser pointer, RF signal receiver, page up/down buttons, and is plug and play. The remote control range is up to 15m and it's powered by 2 x AAA batteries.