Main Function ︰1. Laser pointer function; 2. Page up/down function; Feature︰USB plug-and-play. No driver required. System: WINDOWS98/2000/ME/XP Linux & Mac OS Radio Frequency technology/433.92Hz Control distance: up to 15m Working voltage: 3V Sleep current: 1uA Wavelength: 650nm Max output: < 1mW or < 5Mw Packing︰Zipper pouch Product Description It is very useful for teaching, meeting assorted PC & slide. It is wireless remote control to show the files through computer. Min Order Quantity︰ 100pcs/shipment Battery︰ 2 x AAA