SP800 Smart-Pointer (Black) 2.4Ghz RF Wireless Presenter with Mouse Function Compact and lightweight - only 2.2 oz (with batteries) so easily fits in pocket or carrying case Universal compatibility - works with Windows 10, 8, 7, Vista, XP, Mac OS with one USB Port Presentation Functions - Page Up, Page Down, Up Arrow, Down Arrow, PowerPoint Darken Screen, Start PowerPoint Presentation, Alt-Tab Application Switch RF 2.4Ghz Wireless gives you freedom of movement of 100 ft. - no need to aim the receiver (Laser: Class II less than 1mW ) Runs on two AAA batteries (included), and measures 0.7 x 1.6 x 4.5 inches