Feature: 1. Adjustable Voltage: Fixed output 13.8V DC, when the adjustment switch is toggled, the adjustable power output range is 7.5V‑15.8V. 2. Safe Protection: Maximum output current 30A, continuous current 20A, with 5A fuse, short circuit automatic protection function. 3. Digital Display: Color screen display, clearly display voltage and current, is a high efficiency, compact, high performance switching power supply. 4. Good Heat Dissipation: The AC to DC power supply has a built‑in intelligent cooling fan, which automatically turns on when the internal temperature is higher than 50°C. 5. Wide Application: AC to DC switch transformer is suitable for car radios and marine radios with transmit power below 100W. Specification: Item Type: AC to DC Power Supply Material: Cold rolled steel Protection: Short circuit automatic protection (maximum limit 30A) Output Current: 30A (maximum), 20A (continuous) Fuse: 5A Width: Approx. 155mm/6.1inHeight: Approx. 70mm/2.76in Length: Approx. 205mm/8.07in Uses: Vehicle radios and marine radios with transmit power below 100W . Package List: 1 x AC to DC Power Supply1 x Power Cord1 x Manual Note: 1. Make sure that the corresponding positive and negative poles are connected to the device, and use the correct terminal to connect the cord.2. When the power supply device is plugged into a wall outlet, the power must be turned off first, and the device is in the off state.3. The equipment must be placed in a dry and well ventilated place.