Logitech Wireless Presenter R400, Presentation Wireless Presenter with Laser Pointer Presenter Mode,Built-in Class 2 Laser Pointer, Intuitive touch-keys for easy slideshow control. AA batteries required (best with Polaroid AA batteries) Bright red laser pointer - easy to see against most backgrounds Up to 50-foot wireless range for freedom to move around the room 2.4GHz RF Wireless Technology, Built-in docking bay stores receiver for easy pack up and portability Theres no software to install. Just plug the receiver into a USB port to begin. And when the show is over, you can store the receiver in the presenter