Genuine Dell PA-17 Family 50 Watt AC Power Adapter for Latitude X1 Compatible Part Numbers 	RF449, PG728, V6564, PG728, U6564, U6166, 310-6460 Model Numbers 	ADP-50HH rev B Genuine Dell PA-17 Family For Lattitude Notebooks: Latitude X1 Power Input: 100-240v ~ 1.5A Power Output: 19v -- 2.64A Power Consumption: 50 W