Lenovo Misc External
04W0447
is compatible in the following Models:
Lenovo ThinkPad Edge laptops
ThinkPad Edge E420 - 1141227
ThinkPad Edge E420 - 1141CTO
ThinkPad Edge E420 - 1141R36
ThinkPad Edge E520 - 1143CTO
ThinkPad Edge E525 - 120022U