Wireless Media Controller for Lantern Slide radio frequency laser pointer, page up/down, blank ... screen, play slide and built-in flash memory(512M-4GB)For lantern slideControl distance: 15m/49-feetBattery: CR2032x1Standard color: white/blackSize ... , ME, 2000, XP, Mac OS, Linux and VistaWireless media Controller for Lantern Slide