Philips 2000 series SPK7207B/94, Ambidextrous, Optical, USB Type-A, 1200 DPI, Black Philips 2000 series SPK7207B/94. Form factor: Ambidextrous. Movement detection technology: Optical, Device interface: USB Type-A, Movement resolution: 1200 DPI, Buttons type: Pressed buttons, Buttons quantity: 3, Scroll type: Wheel. Laser color: Red. Power source: Cable. Product color: Black