Product description Color: white, black 1. [Slim, Light and Ready to Travel]: Ultra-slim and lightweight, Arc Mouse goes anywhere without the weight or bulk of traditional mice. Whats more, you can snap it flat and easily slip it in your back pocket or bag for travel. 2. [Design, Refined]: The Arc Mouse features an audible, satisfying snap. Simply snap the Arc Mouse into its curved position to power up. Snap again to flatten and power down. The overall design is optimized for the most comfortable, natural interaction. 3. [Intuitive Interactions]: Arc Mouse lets you scroll both vertically and horizontally for easier, more intuitive navigation. Plus, enjoy precise tracking, with optimized left and right click. 4. [Beautifully Crafted]: Arc Mouse features a slim, smooth, unobtrusive design thats easy on the eyes and fits beautifully within your workspace. From scroll plane to tail, the Arc Mouse is soft to the touch and meticulously crafted to sit comfortably in your hand. 5.Ultra-thin wireless folding mouseDimensions: 131*55*15mm. Battery: 2 AAA alkaline batteries (not included).