DELUX M618 Plus RGB Wired Optical Mouse Ergonomic Vertical Mouse 4000DPI, 4000DPI Wired1. DPI: 800 1200 1600 2400 4000DPI 2. Lighting Setting: RGB light 3. Connection Type: USB Cable 4. Working Voltage: 5V 5. Although M618 Plus has different shape from traditional mouse, it still has the same button position function 6. Through the study of human arm bones, the industrial design of cochlear bionic holding helps to relieve arm discomfort caused by using mouse for long time 7. Nice performance and stability , High light efficiency , all