Tonor 2.4GHz Wireless Optical 1000DPI/1600DPI Mouse Mice for PC Laptop Computer- 12 months Warranty The ambidextrous design enables comfortable use with either hand. Page forward and page backward function makes navigation simple and efficient. 3 DPI resolutions: 800/1200/1600.Works with Windows 2000, Me, XP, Vista, Win 7 win 8.1 and Mac. Plug and play. Smart power-saving mode - the mouse goes into sleep mode after 15 minutes of inactivity. Warranty: TONOR is professional seller in selling mice, we offer Premium after-sale service. a. 12 months 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.