This product is widely used in product demonstrations,e-learning,conferences and other multi-function handheld tools in conjunction with PC or laptop computers,combined with projectors,student learning,company meetings,etc. The wireless control computer is max to 30 meters ,allowing you to operate your computer flexibly in any corner of the classroom or conference.remote control technology:2.4G wireless remote control power:less than 5mw,Indicating light wavelength:650nm interface:USB1.1/USB2.0/USB3.0 interface,plug and play,no special driver :windowsXP/WIN7/WIN10/Linux& Macos/Android Color:Black Material:ABS power:by One AAA battery(not included) Size:136*10mm Package Contents: 1*Wireless PPT Presenter 1*bag 1*manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.