Professional Presenter R800 gives you powerful control for high-impact presentations. Green laser pointer is easy to see, even on flat panel displays, projection screens, and in brightly lit rooms. 2.4 GHz wireless technology offers a range of up to100' (30m). LCD screen with a timer lets you manage your time with silent, vibrating alerts and has controls that are easy to set and adjust. LCD screen also indicates battery power and reception level. Presenter includes a storable plug-and-play wireless receiver, intuitive controls, two AAA batteries and a carrying case. Presenter requires a USB port and Windows XP, Windows Vista, or Windows 7.