GIGABYTE M4, Ambidextrous, Optical, USB Type-A, 6400 DPI, Black GIGABYTE M4. Form factor: Ambidextrous. Movement detection technology: Optical, Device interface: USB Type-A, Movement resolution: 6400 DPI, Buttons type: Pressed buttons, Scroll type: Wheel, Acceleration (max): 50 G. Illumination colour: Blue, Green, Red. Power source: Cable. Product colour: Black