Laser pointer 1.Fast delivery and high quality guaranteed 2. ... two parts: transmitter and USB receiver. Function: 1, Laser pointer;2, Page up/down;3, SD card reader function ... for optional;Technical parameters: Others Feature:1, Large place ... ,XP, Mac OS, Linux,Windows Vista;4, Warranty period: 1 year;5, International standard met: CE, FCC, FDA & ...