Very affordable, and simply all you need to regulate CO2. This CO2 controller can accurately monitor room CO2 levels and turn CO2 regulators or generators on and off. The monitor is preprogrammed to turn devices on at 1300 ppm and off at 1500 ppm with overshoot already calculated. Instead of a costly digital readout, the HydroGEN CO2 monitor uses indicator lights to show approximate CO2 levels. Hydro Innovations uses a high quality, self calibrated, maintenance free SenseAir brand Infrared CO2 detector. The monitor has a standard 120 volt piggyback plug and includes an EZ mount wall bracket. This monitor will work with any CO2 generator or bottle regulator. It is simply all you need to regulate co2 in your garden. Programmed to turn on at 1300 ppm and off at 1500 ppm.Easy to read indicator lights show CO2 levels.Installs easily with our wall mount bracket.120 Volt switched piggyback cord. If you're confused or have questions about CO2, check out our CO2 buyers guide. Want to know know long your tank will last in your growing space? Using a co2 calculator will help you use your CO2 efficiently. Instructions