laptop adapter 19v 4.74a 90W 1)Material: ABS or PS 2) ... )O/P: high accuracy, low noise;6)Environment: operation temperature: a)0°C-40°C, 5%-85%RH; b)shorage temperature ... ’s mainly engaged in designing producing & sales all types of switching power supply: Desktop chargers, travel charger, car charger, battery charger ... ,CB,BS,SAA,CCC and TUV and so on. laptop adapter 19v 4.74a 90W