This mode is an universal switching-mode power supply for laptop and USB, operation at input AV100v to 240V 47-63Hz, Output USB port:5V@2Amax. DC7 voltages: 15V/16V/18V19V/20V@6Amp max,22V/24V@5Amp max, output power 120Watt max, with protection functions:Overload protection, short circuit protection, power supply by mains supply. With 8PCS tip connecter to suit to almost laptop, select output voltage to suit to laptop and make sure the polarity of connect correct before use.