Helps you focus on connecting with your audience, not your computer. Range of 50 feet allows you to control your presentations from your PC or laptop while moving around meeting rooms. Built-in LCD timer with vibration alerts at five & two minutes helps you effectively manage your time. No software required – plug-and-play functionality with any USB port. Intuitive controls including launch / end slideshow, slide forward, slide back, black screen & volume control. Integrated laser pointer, storable 2.4 GHz wireless receiver & carrying case included. Projection Distance: 50 ft; Operating System Compatibility: Mac ® OS 8.6 & Later; Windows ® 95, 98, 2000, XP, Vista ™; Class Type: 3; Presenter Type: Remote.