This model is an universal auto and airplan adapter , operation at input DC voltage 11V to 16V and output DC voltage of 16V/18V/19V/20V DC, output current 4 Amp max ,output power 80 Watt max, with 8 pcs tip connenter to suit to almost laptops , select output woltage to suit laptop and make sure the polarity of tips connect correct before use , with many protection functions use for the notebook computer supply by 12v car battery.