DELL WM527, Right-hand, Laser, RF Wireless + Bluetooth, 1600 DPI, Black DELL WM527. Form factor: Right-hand. Movement detection technology: Laser, Device interface: RF Wireless + Bluetooth, Movement resolution: 1600 DPI, Buttons type: Pressed buttons, Buttons quantity: 5, Scroll type: Wheel. Power source: Batteries. Product colour: Black