Nano Cordless Optical Mouse Gaming Mouse, 7 Programmable Buttons, up to 4000 DPI, 5 User Profiles (bound to specific games), Adopt the 2.4G frequency technology, working distance can reach to 8M-15M, 2.4G will give you a more comfortable, convenient and exact effect than the traditional FM radio wireless mouse Tracking systems: Optical. 100% brand new and high quality. import USB Nano Receiver, stays in your PC, so there's no need to unplug it when you move around. DPI button to select favourite cursor speed, 2000/1500/1000dpi, to suit both ordinary and gaming needs.