Mouse Gembird MUSOPTI4 Optical PS/2

MUSOPTI4 optical mouse USB: 
Optical wheel mouse PS/2 interface 
800 DPI 
3 buttons (scroll wheel button) 
Metallic color 
Ergonomic design 
Features: 
Enhanced optical sensor specially sealed to eliminate erratic cursor movement and dust accumulation and to ensure a longer lifecycle. 
Wheel button-lets you scroll easily in Windows and navigate on the Internet. 
No mouse pad required-can work on any rugged or glossy surface.