The wireless pointer is a professional product using in remote control PCs or media playing devices. With it, you can control your documents in page up, page down, arrow up, arrow down freely. when you give your teaching, documents demonstration, and lectures, you can emphasize the focus by lightly pressed the laser key and the laser light will irradiate the focus area by your orientation control. you can control your screen scroll up and down by the laser pointer no mater where you stand in the hall or classroom. If you like, you can make scene exchanges with your audience in the back of hall and still can control your screen freely, it is this pointer's advantage.