Coolgo&reg; New Laptop Adapter for AC Adapter power charger for HP ProBook 4330s 4331s 4430s 4431s 4435s 4436s - 12 Months Warranty DC-Output :18.5V 3.5A 65W 7.4*5.0MM Input : 100~240V 50/60 Hz Package Includes : One AC Adapter and One US Power Cord for Listed Models 100% OEM compatible! Guaranteed to meet or exceed OEM specifications! Free shipping via USPS first class package from USA, 24 x 7 Email Support. Brand new direct from Professional Manufacturer, 12 Months warranty!