Leitz Cosy Wireless Mouse, Ambidextrous, RF Wireless + Bluetooth, 4000 DPI, Blue Leitz Cosy Wireless Mouse. Form factor: Ambidextrous. Device interface: RF Wireless + Bluetooth, Movement resolution: 4000 DPI, Buttons type: Pressed buttons, Buttons quantity: 3, Scroll type: Wheel. Power source: Batteries. Works on any surface. Product colour: Blue