... 315/433MHz (4) USB plug-and-play * Wireless Red Laser Pointer Pen* Page up/down function* Radio Frequency: 315/433MHz* USB plug ... : press the button to turn on; release to turn off.Page Up: support PPT, WORD, EXCEL, Internet Browser, Picture Browser, ... :8KG 6.PRODUCT COLORstock:black, silver,blueorder:black, silver, white, red, blue, green, yellow etc.. 7.Application areasTeaching & Presentation,Lecture ...