... , ranging from 0-4G *Green Light Wireless Laser Pointer*Page up/down function1.COMPONENT Transmitter 1 Receiver 1 Battery 1 ... to turn on; release to turn off.Page Up: support PPT, WORD, EXCEL, Internet Browser, Picture Browser, etcPage Down: support PPT, WORD ... , EXCEL, Internet Browser, Picture Browser, etcBuild-in USB Flash(Optional Function)RF technology, control ...