Features: 1.Used for all computers with USB ports, and can be freely presented within the effective remote control range. 2.Suitable for PPT pointer, page up, page down, power switch, black screen, full screen. 3.Plug and play, no need to install other programs can be used immediately. 4.Radio frequency technology 315M \ 433.92Hz, remote control about 15 meters. 5.The humanized appearance designed brings you excellent and comfortable feeling. specification:Item Type: PPT Pointer Battery: 1 x AAA battery (not included) Battery capacity: 600mAh Function: PPT pointer, page up, page down, power switch, black screen, full screen Remote control technology: RF technology 315M \ 433.92Hz, can control about 15 meters PackageList:1 x Page Turning Pen1 x Storage Bag1 x Manual1 x USB Receiver