AC/DC Switching Power supply with 12W Maximum Output Wattage and Short-circuit Protection have UL,CSA,CE,TUV,GS,BS, ... % at 100V AC, more than 78% at 220V AC Ripple and noise: 50 to 150mVp-p Working temperature: 0 to 50 ... , A/V products, cellphone charger, network information, security equipment, small home appliances, and more Certifications: UL, cUL, FCC, CCC, CE, BS, CB ...