... 85%Ripple and noice: <1%Operating temperature: -20°C+45°CStorage temperature: -20°C+75°CMTBF: 50,000HoursProtection: Short,Over voltage,Over ... researching, developing, manufacturing and marketing switching power supply, AC/DC power adapter, USB charger ,Switching power supply transformer, computer ... ),SAA(Australia),BS(England),KC(Korea),PSB(Singapore),CB,C-TiICK, ENERGY STAR,ERP,EUP,MEPS etc.we are ...