Specification: Color: Black The 7D Game level optical mouse User-defined dual-mode switching system Mouse size: 115mm x 77mm x 39mm+\/-0.5mm Adjustable resolution: 800\/1200\/1600\/2000DPI Buttons: 7 buttons with scroll wheel Rated voltage\/current: DC 5V-100mA USB cable length: up to about 1.8m Built-weight iron， feel comfortable， mobile and stability - 500-1000Hz adjustable speed FPS design  Package included: 1 x mouse