Product Type: Input:100-240V 50-60Hz Output:19.5V-6.67A Watts Connector Size: Interior diameter: 4.5 mm ; External diameter: 3.5mm; (Note: Please make sure the DC output and tip size of ac adapter are accordant before you buy TSKYBEAR Compatible with Dell Precision 5530 5510 5540 5520 M3800 Laptop Charger TSKYBEAR Compatible with Dell XPS 15 7590 7570 9530 9560 9550 AC Adapter Laptop Charger Superior Safety: Overload protection and a fire-retardant casing ensure complete protection for you and your devices