Specifications: Type: Arc wireless mouse Color:Black,Blue,Red,White,Silver,Purple Size: approx:111mm*58mm*35mm/4.37"*2.28"*1.37" Power: 2xAAA battery (not included) 2.4G SPEC: RE: 2402MHz-2480MHz RF operation channel : 16, automatic fredunency hopping Rated voltage: 1.5V/3.0V Rated current: 7.5-14mA. Max. Acceleration: 28ft/Sec USB: ver 1.1/2.0 System requirement: For Windows 2000/XP/Vista/Linux/Win 7/MAC operation system One USB available port. Package Include: 1 x 2.4Ghz Foldable Wireless Optical Mouse for Laptop/PC 1 x USB Wireless Receiver(hidden in mouse) Notes: 1. Operation distance is closely related to the environment. Battery life may be different for personal habit of using mouse 2. In case of mouse failure,please check battery power and replace it as necessary 3. The mouse will shut off automaticaly and enter sleeping mode for saving power when it s not used for a long time. To wake it up,press the right or lefe button 4.Please allow slight size deviations due to manual measurement,measuring methods and tools. 5.The picture may not reflect the actual color of the item because of different photographing light and display monitor.Thanks for your understanding. 1.The mouse adopts the USB receiver the mouse button, and it is easy to install and can play when plugging USB receiver. 2.4GHz digital wireless transmission,operation distance is up to 10 meters. 1000dpi-1200dpi-1600dpi e cursor speed adjustable. 3.Ergonomically designed,comfort grip.The folded design is convenient and you can carry it around easily. 4.No need to code,plua-and-play.Intelligent Power-saving technology,the service lfe of one alkaline battery is up to six months.Dormant class control and more power-saving hibernation connectionless. 5.Built-in mouse memory,no recoding is needed after battery replacement.