● New 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 quality 2.4 GHz wireless connection, operating distance up to 10 m (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. Specifications: * Operating frequency: 2402 MHz-2480 MHz * Transmission Distance:> 10M, 360 ° * Adjustable resolutions: 500 / 1000cpi * Tracing system: Opitcal * Operating current: 15mA * Power supply: 1.5V AAA * 1 * System Requirements: Windows98, XP, Vista, Windows7, Tablet PC, Mac OS X, Linux Package contents: 1 * Mouse pen 1 * 2.4 GHz USB receiver 1 * support