Conceptronic CWLPRESENT, USB, 1574.8" (40 m), Black Conceptronic CWLPRESENT. Wireless receiver interface: USB, Frequency band: 2.4 GHz, Wireless range: 1574.8" (40 m). Product color: Black, Presenter functions: Laser pointer, Remote control. Battery technology: Alkaline, Battery type: AAA. Windows operating systems supported: Windows 7 Professional, Windows 7 Starter, Windows 7 Ultimate, Windows Vista Business, Windows..., Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Weight: 2.12 oz (60 g)