1,Constant Voltage 2,Output: 48W,12V 3,Certification: CE,RoHS 4,2 years ... 50/60HzInput Current 0.5A(Max)Output Voltage 12V Output Current 4AOutput Power 48WRipple and Noise ≤80Mv at full road ... efficiency.3. With short-circuit and overload protection.4.Power adapters with overvoltage protection, short circuit protection, overload ... or repaired bad product. 2012 switching 48W ac/dc desktop power supply