120w Universal ac adapter can identify the output voltage of the laptop automatically,It alse have a big LCD monitor displays.. 120w Universal ac adaptercan identify the output voltage of the laptop/notebook computer automatically,It alse have a big LCD monitor displays the value of output voltagePower: 120WInput:110V--240V Output voltage: DC15, 16, 18.5, 19VOutput current: 6A Max One USB port, ...