GASKY Professional Gaming Mouse, Ergonomic Wired Mouse, 6 Buttons and 7 Colors Breathing Light, 4 DPI Levels(1000/1600/2400/3200) Ergonomic Design: Customized groove design on both sides is special for human palm. It prevents your hand and fingers from fatigue and hurt of long time gaming or working. Easy Operation: 6 Buttons design for single hand operation (Please check the fourth picture to know the function of each button). You just need to use one hand to control the browser when you lay on the couch. And you can also use the 6 buttons to complete more complicated operation when you are playing games. Adjustable DPI: There are four ranks of DIP for choosing - 1000 / 1600 / 2400 / 3200. High DIPoffers smooth&precise tracking and helps you fulfill more accurate operation. 7 Color Breathing Light: It makes a colorful and comfortable environment. The color will change automatically according to different DPI. Convenience: No additional software or firmware required.