Philips SPK7204/00, Ambidextrous, Vertical design, Optical, USB Type-A, 1000 DPI, Black Philips SPK7204/00. Form factor: Ambidextrous, Vertical design. Movement detection technology: Optical, Device interface: USB Type-A, Movement resolution: 1000 DPI, Buttons type: Pressed buttons, Buttons quantity: 4, Scroll type: Wheel. Laser colour: Red. Power source: Cable. Works on any surface. Product colour: Black