Logitech Professional Presenter R800 gives you powerful control for high-impact presentations. The brilliant green laser pointer is easy to see, even on LCD and plasma displays and in brightly lit rooms. Green laser pointer 100-foot (30-meter) effective range with 2.4 GHz wireless technology LCD display with timer, battery-power and reception-level indicators Built-in slideshow buttons Timer buttons Silent alarm Storable plug-and-play receiver On/Off switch Carrying case