... based on PowerPoint and MultiMedia,which has optical mouse function,can be used free This is a style of PC remote controller ... phases switching, off/ Presentation/ Music (Media Player) 3. Optical Mouse( 360omove,use free)4. Phase 1 buttons: page up, down, left, right ... or < 5MwPacking: Color box with carry bag 2.4GHz (Optical Mouse,use free!) Wireless Presenter Red Laser Pointer