1.Best Notebook ac power supply 120W 2.DC12- ... 22-24v 5a max.Frequency50/60HZEfficiency>85%Power cord 1.2m-1.5m2*0.3mm2, CCA.US, EU, AUS,UK ... than 2 Hour Burn-In Test 100% 4 times electrical performance test100% dropping test from 6 surface 100% Solder ... size: 139*61*31mmAdapter N.W.350gWarranty12monthsvoltage AdjustBy slide switch Advantages 1. 8years professional factory, ISO9001: 2008, GMC, BV,TUV ...