This model is an universal switching-mode power supply for laptop, operation at input AC100V to DC240V 47-63HZ, Output: USB port:5V@2A max.DC7voltage: 15V/16V/18V/19V/[email protected] max, 22V/[email protected] max output power 90 watt max, with protection functions: Overload protection, short circuit protection, power supply by mains supply. With 8PCS tip connecter to suit to almost laptops, select output voltage to suit to laptop and make sure the polarity of tips connect correct before use.