Tanboo 2.4G Pen-Shaped Adjustable 500/1000 DPI Wireless Mouse (Blue) Innovative mini pen-style mouse provides accurate and easy control of the mouse cursor. 2.4GHz wireless connection, up to 10m operation distance. Adjustable 500/1000 DPI optical sensor for smooth movement control. Power saving: if there is no 2.4GHz signal, it will automatically power off. Pen shaped, especially suitable for handwriting input.