The 180W AC Adapter Charger & Power Cord by NICPOWER is designed specifically for Dell Precision laptops. It offers a voltage of 19.5V and is compatible with various Dell models including the Precision 7540, Vostro 3360, and Inspiron Desktop 27 (7777). This power adapter also works for Alienware Area-51m R2, OptiPlex 3011, and G Series laptops. With its reliable brand and compatibility, this charger is a reliable choice for keeping your Dell laptop powered and ready to use.