This model is an universal switching-mode power supply for Laptop, operates at input AC 100V to 240V 47-63Hz, rated input AC 120V-230V, 50-60HZ; output USB port 5V@2A , DC 7 Voltages: 15V/16V/18V/19V/20V @4.5A max, 22V/24V @ 3.75A 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 voltage to suit to laptop and make sure the polarity of tips connect correct before use