Logitech Wireless Presenter R400

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 There's 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 Battery type: 2 AAA batteries, Battery life (Laser pointer): 20-hour maximum and Battery life (Presenter): 1050-hour maximum