Tonor Purple 2.4GHZ USB Receiver Wireless Mouse for Laptop Mac Computer Requires 2*AAA battery to run. (Not included) Turn on/off/light on: go to power saving mode by turn on, go to lighting mode by light on USB receiver stows away inside the mouse when not in use; Wireless mouse with tiny USB receiver.compatible with Windows 2000/Vista/Win7/Win8/Mac OS X(10.2.8) or higher. Made of frosted material, excellent comfortable grip, lightweight but durable. Warranty: a. 1 year warranty. b. 2 months hassle-free return policy. c. Seller pays for return if item is DOA or not as described. Fulfilled by amazon with fast shipping.