Product Description: Power: 2xAAA battery (not included) Color:Black,Blue,Red,White,Silver,Purple Size:approx:118mm*58mm*35mm/4.64"*2.28"*1.37" Package Include: 1 x 2.4Ghz Foldable Wireless Optical Mouse for Laptop PC 1 x USB Wireless Receiver(hidden in mouse) 1. The mouse adopts the USB receiver the mouse button, and it is easy to install and can play when plugging USB receiver. 2. The folded design is convenient and you can carry it around easily. 3. The mouse can turn off automatically after being folded, and it can turn on automatically when unfolded. 4. Ultra Slim and Comfortable Design: Compared to similar products on the market, our wireless laptop mouse is much lighter and thinner. It can easily be stored in your laptop bag, which is perfect for travel. 4. The 2.4GHz wireless transmission up to 10m/32.81FT ​operating distance.