wireless mouse 2.4 1.wireless presenter with thumb mouse; 2.Integrative design; 3.CE, ... transmitter and USB receiver.Function 1, Laser pointer;2, Page up/down;3, Play / ESC : play PowerPoint ... Feature1, Mini receiver can be stored into transmitter;2, Thumb mouse, laser mouse & optical mouse ... integrative;3, Warranty period: 1 year;4, International standard met: CE, FCC, FDA & RoHS5, ...