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 Replacement for Dell Precision 5530 5510 5540 5520 M3800 Laptop Charger Compatible with Dell XPS 15 7590 7570 9530 9560 9550 AC Adapter Laptop Charger Our Service For You: For 12 months from the date of purchase, If the product fails, we will replace it with a new one