A4Tech OP-620DS Wired Optical Mouse – Silent Clicks, 1200 DPI, USB, 4 Buttons, 1.5m Cable, Ergonomic Design, Black
 
Specifications
Model：OP-620D 
Type: Wired
Ergonomic Design: Symmetric
Sensor: Optical
Resolution: 1200 DPI
Buttons No.: 4
Port: USB
Cable Length: 150 cm
Size: 119(L) x 63(W) x 36(H) mm
Net Weight:91 g (w/ cable)
System Requirements: Windows XP / Vista / 7 / 8 / 8.1 / 10