Built-in slideshow buttons
Up to 50-foot effective range with 2.4 GHz wireless technology
Red laser pointer with LED indicator
Plug-and-play, no software required
Storable receiver and carrying case
Battery-power indicator
On/Off switch

Pick up in EV. Original price $50. For pics and details :
http://www.logitech.com/en-us/product/wireless-presenter-r400