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 , 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 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, (KeynoteNumbers), 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.