For Dell Latitude 3390 2 In 1 AC Adapter Charger Power Supply 45W Mains Charger

Approvals CE,FCC 100% OEM Compatible Over-charge protection Short Circuit Protection Over Voltage Protection Electromagnetic Compatibility Input: AC 100V - 240V 50-60Hz Input Connecter standard：2 pin DC Output: 19.5V2.31A 45W Connecter size:4.5mm*3.0mm.

eBay