Question about Dell DM3WC

Item is compatible with the following models:
- Dell Latitude 12 7000 7280 7290
- Dell Latitude 13 7000 7380 7390
- Dell Latitude 14 7000 7480 7490 Series
- Dell Latitude E7280 E7380 E7480 E7290 E7390 E749 0 Series Not suitable for Dell Latitude 7390 2-in-1 Series