Insten Black 3-Button USB Wired Optical Scroll Wheel Mouse Compatible With PC Laptop Mac This optical mouse will glide across your desk without having to use a mouse pad It can be used on almost any surface because it uses sensors to record the movement optically With no mouse ball, there are no parts to get dirty, so cleaning is a snap. Features: Posting Device Host Interface: USB; Movement Detection: Optical Movement Resolution: 800 dpi; Dimensions: 4.25 x 1.25 x 2.3 inch (L x H x W); Cable Length: 56.5 inch / 4.7 feet; Color: Black