... shortcut key Built in flash memory Function: *Technology:Radio Frequency *Red Laser Pointer,Page up/down ,wireless mouse ,wireless keyboard shortcut ... )*Transmitter size :11.9*3.1*1.7cm*USB Plug and play,no driver required. *Battery:AAA*2PCS *Operating system :Windows ... ,XP,Mac OS,Linux, Vista 2012 hot selling wireless presenter with red laser