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.Pointing Device Connectivity Technology: CableMovement Detection: OpticalMovement Resolution: 800 dpiNumber of Total Buttons: 2Scroller Type: Scroll WheelPointing Device Host Interface: USBColor: BeigeHeight: 1.8Width: 2.5"Depth: 4.9"Green Compliant: YesGreen Compliance Certificate/Authority: RoHSLimited Warranty: 1 Year"