This Infrared Presenter is so small that you can put it into your pocket, suitable for teaching, meeting, speech, training. Best suit doctors, professors, business professionals. Built-in Laser Pointer remote. Page up and down function. USB plug in and play, No need to install software. Simply plug the receiver into the USB and then you re are ready to present using the buttons on the pointer. Allows you to present your slides remotely without having to use a mouse or tap the keyboard. Control distance is over 50 feet. Works with MS Power Point, MS Word, Adobe. Operating system: Vista, Windows 98/ME/2000/XP, Mac OS.