DELL MS3320W, Ambidextrous, Optical, RF Wireless + Bluetooth, 1600 DPI, Green DELL MS3320W. Form factor: Ambidextrous. Movement detection technology: Optical, Device interface: RF Wireless + Bluetooth, Movement resolution: 1600 DPI, Buttons type: Pressed buttons, Buttons quantity: 3, Scroll type: Wheel. Power source: Batteries. Product color: Green