This model is a switching-mode power supply ,
operates at input DC voltage 12V to 15V
and output DC voltage of 15V/16V/18V/19V/20V DC,
output current 5 Amp max ,
output power 100 Watt max,

with 8 PCS tip connenter to suit to almost laptops ,
select output voltage 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 1V car battery.