This is the Fingerprint reader module circuit board compatible with the following Dell systems-

for Compatible Dell Laptops:
-Latitude 5580
-Latitude 7480
-Latitude 5480
-Latitude 7280
-Latitude 5280
-Latitude 5285 2-in-1
-Latitude 5590
-Latitude 5591
-Precision 3520
-Precision 3530

for Dell P/N: WN9D2, 0WN9D2