DELL MS5320W, Right-hand, Optical, RF Wireless + Bluetooth, 1600 DPI, Gray, Titanium DELL MS5320W. Form factor: Right-hand. Movement detection technology: Optical, Device interface: RF Wireless + Bluetooth, Movement resolution: 1600 DPI, Buttons type: Pressed buttons, Buttons quantity: 7, Scroll type: Wheel. Power source: Batteries. Product color: Gray, Titanium