DESC: The Logitech® Cordless 2.4 GHz Presenter helps you focus on connecting with your audience, not your computer. Take advantage of its 50-foot range to control your presentations while moving around an auditorium with confidence. A built-in LCD timer with vibration alerts at five and two minutes helps you effectively manage your time. No software is requiredjust plug it in and it works. The built-in controls for ‘Launch Slideshow´, ‘Slide Forward´, ‘Slide Back´, ‘Black Screen´ and ‘Volume´ put the most-needed presentation tools in the palm of your hand. There´s even an integrated laser pointer to help you emphasize your key messages.