iOne Lynx-R21 4-Button USB Optical Scroll Gaming Mouse (Red/Black) iOne Lynx-R21 4-Button USB Optical Scroll Gaming Mouse General Features: Red and black color Fashionable and modern design Full speed USB interface with up to 500 reports rate per second 4 buttons with scroll wheel 1600 dpi with 37 IPS tracing speed and acceleration up to 20G One (1) dpi adjustable button to switch between 400, 800 and 1600 dpi Ergonomic design Approximately 6-ft. USB cable length