This regulator allows you to tap two kegs at the same time and individually control the pressure to each keg! Great for homebrewers. The Two Product Two Pressure CO2 Regulator has two separate gauges to individually measure the pressure to each keg and allow you to adjust it particularly for the type of beer or beverage you are drinking. A third gauge (left gauge) shows you how much CO2 is left in the tank, so you dont run out. Individual air shut off valves allow for each CO2 line to be turned on/off independently. Preset safety pressure relief valve automatically releases at 55-65 PSI. The lightweight polycarbonate bonnet is durable and will not corrode in wet environments. No special tools are required to raise or lower the CO2 pressure. The easy to use cap knob simply pulls out to adjust pressure up or down then pushes back in to lock in pressure.