This product applies high frequency switch convertion technology to convert the power net voltage into 13.8V standard DC power which is specially designed for minor household transceiver, can movable equipment and portable units.Features a small dimension, high efficiency and low ripple voltage, etc. Input Voltage: AC110V ±15% or 220V ±15% Output Voltage: 13.8V ±3% 0.5% power adjustment rate Applies overload short circuit protective circuit.