Universal DC Adapter (90W) (Auto&Air) Features: ﹡With High efficiency and true voltage output automatically (without operation by hand); ﹡Auto-reset to the lowest voltage(+15V) after current interruption to protect your laptops/ notebook computer; ﹡Including 12 connectors(including 4 option ones) for user to change voltage easily; ﹡Different voltage suitable for the most laptops/notebook computers; ﹡Patent design; Specification: Type Output Connector Size Fit for laptops 15.0V/M1 15.0V/Max90W 6.3*3.0mm Toshiba 16.0V/M2 16.0V/Max90W 5.5*2.5mm IBM,Lenovo 16.0V/M3 16.0V/Max90W 6.5*4.4mm Sony,Fujitsu 18.5V/M4 18.5V/Max90W 4.8*1.7mm Compaq, HP 19.0V/M5 19.0V/Max90W 5.5*2.5mm Acer, Compaq, Delta, HP, Fujitsu, Gateway, Toshiba, Liteon 19.0V/M6 19.0V/Max90W 5.0*3.0mm Samsung 19.0V/M7 19.0V/Max90W 5.5*2.1mm Acer, Compaq, Delta, HP, Fujitsu, Gateway, Toshiba, Liteon 19.5V/M8 19.5V/Max90W 6.5*4.4mm Sony 19.5V/M9 19.5V/Max90W 7.4*5.0mm Dell option 20.0V/M10 20.0V/Max90W 3 holes Dell option 18.5V/M11 18.5V/Max90W 7.4*5.0mm HP,Compaq option 20.0V/M12 20.0V/Max90W 8.0*5.5mm IBM,Lenovo option