DELL AW558, Right-hand, Optical, USB Type-A, 5000 DPI, Black, Silver DELL AW558. Form factor: Right-hand. Movement detection technology: Optical, Device interface: USB Type-A, Movement resolution: 5000 DPI, Buttons type: Pressed buttons, Buttons quantity: 4, Scroll type: Wheel, Acceleration (max): 20 G. Power source: Cable. Product colour: Black, Silver