Features 1、Wireless: 2 4GHz wireless transmission technology, strong performance and stability, 10 meters wireless transmission distance. 2、Three Kinds of DPI Adjustable: 1200/1600/2400 DPI, wireless optical engine, precise positioning. 3、Intelligent Power Saving: The built in low power timer will switch to the energy saving sleep mode if it is not moving for 5 minutes, move or click the mouse button to wake it up. 4、Ergonomic Design: Comfortable grip, long term use will not fatigue, making work easier. 5、Appearance Design: Stylish and exquisite design, stylish appearance and portable use. Specification Item Type: Wireless Mouse Material: ABS Model: G838 Wireless Distance: Approx. 10m / 10.9yd Work: Optoelectronics Resolution: 1200/1600/2400 DPI Operation Mode: Photoelectric Battery: 2 x AAA Battery (Battery not Included) System Requirements: for Windows 98 / Me / 2000 / Xp / Vista / Win 7 / Win8 / 10 / Vista OS or New Version. Package List 1 x Mouse 1 x USB Receiver