Two product secondary CO2 draft beer regulator has a bold design with elite functionality. Secondary regulators are used when you are attempting to dispense two or more kegs off of the same CO2 tank at different pressures. This secondary regulator has two manual pressure release valves and internal pressure relief valves that release pressure at 55-65 psi, two large pressure adjustment knobs, and two brackets that allow it to be mounted to a wall or the inside of the keg refrigerator. In order to use this secondary regulator, you will still need a primary regulator with one output that connects to the secondary using a piece of the airline. The product has two barbs and two gauges that indicate how much CO2 pressure is inside of each keg.