(1)Green Light Wireless Laser Pointer (2)Page up/down function (3)USB ... -play (4) USB flash memory, ranging from 0-4G *Green Light Wireless Laser Pointer*Page up/down function 1.COMPONENT Transmitter ... : support PPT, WORD, EXCEL, Internet Browser, Picture Browser, etcPage Down: support PPT, WORD, EXCEL, Internet Browser, Picture Browser, etcBuild-in USB Flash(Optional Function ...