Conceptronic Optical Wireless 5-Button Desktop, Right-hand, Optical, RF Wireless, 1600 DPI, Gray Conceptronic Optical Wireless 5-Button Desktop. Form factor: Right-hand. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1600 DPI, Buttons quantity: 5, Scroll type: Wheel. Power source: Batteries. Product color: Gray