40 AMP PWM power controller for HHO kits

For an inexpensive PWM to control power to your HHO kit- these are a great solution. If you have one of our kits, you can use these with the Digital AMP Gauge we include, so you can monitor precise current control of your hho generator. This is a completely assembled 40 amp PWM with 6 power MOSFETS inside to divide up the power to keep it from overheating, so a fan is not needed. That allows a very nice compact box that is easy to install and hook up. These are nice units and come with ventilation slots cut into the sides to allow air to be drawn up and over the cooling heat sinks. They come with a single dial for current control, 6 individual mosfets and heat sinks inside. Operates from 12 volts up to 30 volts DC. It has 4 connections inside the box at the back, making installation simple. Two of the screws are for POWER IN from the battery, and the other two are POWER OUT to the HHO generator. TO HOOK UP: Simply unscrew the terminal connector, strip 3/8" insulation off the wire, sli