Brand new and high quality 2.4GHz wireless connection, up to 10m operation distance (depend on environment) Power saving: if there is no 2.4GHz signal, it will automatically power off. Ergonomic design, fits comfortably on your hand, low voltage alarm function, reminds you to replace battery in time. Pen shaped, especially suitable for handwriting input. Real Plug and Play, no extra driver needed. Product Descriptions: Brand new and high quality 2.4GHz wireless connection, up to 10m operation distance (depend on environment). Power saving: if there is no 2.4GHz signal, it will automatically power off. Ergonomic design, fits comfortably on your hand, low voltage alarm function, reminds you to replace battery in time. Specifications: *Operating frequency: 2402MHz-2480MHz *Transmission distance: >10M,360° *Resolutions Adjustable: 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 * Pen Mouse 1 * USB 2.4GHz Receiver 1 * Mount