This is a metal box with fans. According to the spec listed on the Revain (see image), the input voltage range is 15 to 40 volts with an output voltage of 12 volts. If you look at the picture of the back of the converter you will see that the specifications are between 20 and 60 volts. My intended use was to convert 16 volts to 12 volts, but that didn't work due to the mismatch. Be aware of this before you buy.
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