1、4GHz wireless connection, up to 10m operation distance. Power saving: if there is no 4GHz signal, it will automatically power off. 2、User-friendly key position design, which is easy to grasp. Designed with a wheel for page turning during PPT presentation. 3、Adjustable 500/1000 DPI optical sensor for smooth movement control. The initial setting is 1000CPI, you can use the CPI speed switch key to get your favorite cursor speed. 4、Pen shaped, especially suitable for handwriting input and can be used on narrow desktop. Real Plug and Play, no extra driver needed. The small mouse base will not take up too much space. 5、Low voltage alarm function, reminds you to replace battery in time. When all the battery power is low, the low voltage alarm light will light up to remind you to replace the battery as soon as possible. Please use alkaline AAA batteries.