This voltage reducer appears to work as advertised. Installation is relatively easy - depending on the car you're installing it in. After the device is assembled and the output wires are connected to the load, the input wires are connected to the batteries. This creates a brief spark. I would like the manufacturer to state how much current the device draws with no load. A product search revealed a range of voltage reducers that were identical in all respects except for price. Based on that, I made my choice.
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