Features: 1.Allows you to convert DC 24V voltage to DC 12V voltage, so as to powering 12V devices such as auto stereo, subwoofer, GPS navigator that can be used in 24V vehicles 2.High efficient switch-mode voltage regulation models that provide 100 percent reliability of the power converter 3.Built-in over or under voltage input, overload, overheat, and short circuit full protection, more safer to use 4.With preset voltage memory function and power fail preset safeguard function 5.High quality metal shell, anti-seismic and corrosion resistant, durable for long time useSpecification:Features: Allows you to convert DC 24V voltage to DC 12V voltage, so as to powering 12V devices such as auto stereo, subwoofer, GPS navigator that can be used in 24V vehicles. High efficient switch-mode voltage regulation models that provide 100 percent reliability of the power converter. Built-in over or under voltage input, overload, overheat, and short circuit full protection, more safer to use. With preset voltage memory function and power fail preset safeguard function. High quality metal shell, anti-seismic and corrosion resistant, durable for long time use. 3 input wires and 3 output wires, easy to install, but professional installation is recommended. Specifications: Material: Iron Color: Black Input Voltage: 21V-28V Output Voltage: 12V Output Current or Rated Power: 5A or 60W, 10A or 120W, 15A or 180W, 20A or 240W, 30A or 360W, 40A or 480W (optional) Battery Loss Without Load: 90 percent Working Temperature: 0 - 40 Voltage Alarm: 20V Over-temperature Protection: 55 - 77 Size: as picture show Package Weight: 322-737g Package List: 1 x DC 24V to 12V Power ConverterPackageList: