A4Tech op-620d-w USB optical white .

Description: Connection interface: USB Type A, operating principle: optical LED, number of keys: 4, optical sensor resolution: 620 dpi
Type: Mouse
Connection type: Wired
Principle of operation: Optical LED
Connection interface: USB Type A
Number of keys: 4
Built-in Options: Scroll wheel
Optical sensor resolution: 620 dpi