wireless mouse 2.4 1.wireless presenter with thumb mouse; 2.Integrative design; 3.CE,FCC, ... ! With it, you don't need to stand beside your computer or have an additional person ... 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, ...