This pulse generator really works well. It is priced for the person who has to stay within a budget so we have named it The Economy Splitter. We used a cheap box and cheap knobs to save you money where we could. This unit takes 12 Volts. It is designed to handle 12 Amps. It will produce a single pulse to 37 Amps, but at a high temp. it drops to 7.3 Amps. We therefore suggest that you run a 7 amp fuse to protect the unit. The unit has a large heatsink and a flashing LED. There are 5 possible frequencies that you can chose from. This is guaranteed to work and is guaranteed to produce Hydrogen. Some units sold on ebay are not pulse generators at all. They are speed controllers. That is why they do not guarantee that they work and they don’t guarantee that they will produce Hydrogen. No wonder. They are not designed to produce Hydrogen.