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. 【Cool Power Switch】Snap the Arc Mouse into its curved position to power up. Snap again to flatten and power down. Touch bar replaces the wheel of a normal mouse.(Note: Before using the mouse, you need to bend the mouse to turn on the power. If the mouse is flat, the power is turned off and cannot be used.) 【Ultra-slim and Portable】The arc mini bluetooth mouse, lightweight and easy to carry, goes anywhere without the weight or bulk of traditional mice. What’s more, you can snap it flat and easily slip it in your back pocket or bag for travel. 【Plug and Play】Tiny wireless receiver conveniently slots into your computer's USB port, taking up minimal space. Perfect for work and entertainment in home or office. 【Universal Compatibility】Well compatible with Windows7/8/10/XP, Vista7/8, Linux and Mac OS X 10.4 etc. Fits for desktop, laptop, PC, Macbook and other devices. (Pls Note: this mouse is connected by USB receiver, will NOT compatible with Macbook Pro or other devices which only have Type C ports) 5.Built-in mouse memory,no recoding is needed after battery replacement.