Kensington Pro Fit Wired Washable Mouse, Ambidextrous, Optical, USB, 1600 DPI, Black Kensington Pro Fit Wired Washable Mouse. Form factor: Ambidextrous. Movement detection technology: Optical, Device interface: USB, Movement resolution: 1600 DPI, Buttons type: Pressed buttons, Buttons quantity: 3, Scroll type: Trackball/Wheel. Power source: Cable. Product colour: Black