Wireless Optical Pen MouseNew and high quality 2. 4 GHz wireless connection, operating distance up to 10m (depends on the environment) Energy Saving: If there is no 2. 4 GHz signal, it will turn off automatically. Ergonomic design, fits comfortably on your hand, low voltage alarm function, remind you to replace the battery in time. Pen shaped, particularly suitable for handwriting. Real Plug and Play, no additional driver needed. Product Descriptions: Brand new and high