(1)Green Light Wireless Laser Pointer (2)Page up/down function (3)USB plug-and-play (4 ... flash memory, ranging from 0-4G *Green Light Wireless Laser Pointer*Page up/down function1.COMPONENT Transmitter 1 Receiver 1 Battery ... press the button to turn on; release to turn off.Page Up: support PPT, WORD, EXCEL, Internet Browser, Picture ... year from the date of purchase. Green Light Wireless Laser Pointer