One for OfficeGVKRLXZ 130W 90W AC/DC Adapter Compatible with Dell Inspiron 27 inch 7720 7710 7790 7500 7501 7590 7591 7790 AIO 2 in 1 7700 7791 AIO 2 in 1 Desktop Power Adapter Supply Cord One for HomeGVKRLXZ 130W Laptop Charger Compatible with Dell Inspiron 24 5420 5415 5410 5400 5490 5401 2 in 1 Desktop Power Adapter Supply Cord,Compatible with Dell 130W Desktop Adapter One for SchoolSpecificationsInput Voltage: 100-240V 50-60Hz, Output: 19.5V 6.67A 130W, DC Connecter size: 4.5*3.0mm tip; (Not Type C interface,double CHECK picture before bid,please!) Efficiency & Safety ChargingGVKRLXZ as a Professional Notebook Power Supplier, we promised that our product Features premium oxygen-free copper wires with thickened tin plating for better conductivity and faster charging; Multiple protection systems prevent Over Voltage output Protection, Over Current output Protection,Short Circuit output Protection, and real-time temperature detection and high-speed heat dissipation let y