The adapter is designed to power your computer and charge its internal batter from a DC power source. The adapter supplies regulated power to the Dell Latitude 14 Rugged, Latitude 14 Rugged Extreme, and Latitude 12 Rugged Extreme Convertible laptops Features: -Power surge protection and power input regulator. -Rugged design for dust, moisture and high humidity. -Sealed and potted in aluminum extrusions for the harshest environments. -11 to 16 VDC input voltage. -20 VDC output voltage. -Cigarette adapter version. Compatible Docking Stations / Cradles: -Dell Latitude 14 Rugged Laptop -Dell Latitude 14 Rugged Extreme Laptop -Dell Latitude 12 Rugged Extreme Convertible Laptop 3 year warranty by Lind.