Usage Tips: Wireless Presenter with finger ring design, the -resistant ring adjustable to fit finger sizes . The control area with buttons can be controlled simply by your thumb, Support your both hands for comfortable control all day long. A red and bright laser-pointer that's easy to see against most backgrounds, highlight key areas of your slides, super easy to use to take your eyes of your audience. Equipped with top-grade , wireless control range up to 12 meters, so you can free to move around the room and interact with your audience. The mini USB receiver supports plug and play technology. No driver is required. Built-in docking bay stores receiver magnetically so you are less likely to lose your receiver. One-Touch-keys easy to control slideshow. Buttons: laser-pointer, page up, page down, launch slide show, black screen, switch on/off. Built in rechargeable -polymer battery. You can charge it by a laptop or wall adapter via the standard -USB input port. Comes with auto standby and deep sleep functions for energy-saving and durable use, equipped with a separate switch that effectively avoids unwanted power consumption when you put it in your bag. Support : Supports Word, Excel, PowerPoint, ACD See, website, (Keynote& Numbers&Pages), Gooles Slides, Prezi,etc; Supported OS: Win2000,XP,Vista,Win7,Win8,Win10, OS, Linux Color: black Material: PC Package Contents: 1 * Wireless Presenter 1 * Receiver 1 * USB Cable 1 * Portable Bag 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.