Yuntab Portable Wireless Pen Mouse 3 DPI Level (800/ 1200/1600) for tablet PC and Iphone 6 / Iphone 5S and Android Cell Phone (Blue) Touch pen mouse with web browsing instruction 2.4G Wireless touch screen Pen Mouse,10m effective distance, USB receiver with plug and play. Adjustable 500/1000 DPI optical sensor for smooth movement control. Pen shaped, especially suitable for handwriting input. Real Plug and Play, no extra driver needed. Low voltage alarm function, reminds you to replace battery in time. Designed with a wheel for page turning during PPT presentation.