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Simple and easy-to-use, the Spartan Series Basic CO2 Controller gives you everything you need to accurately raise the CO2 levels in your growing environment. A large easy-to-read display will show you what your ppm levels are and knobs that double as buttons when pushed allow you to quickly and easily program the controller to your liking. This unit features an override function that allows it to be used in conjunction with a stand-alone exhaust controller so that you are not putting valuable CO2 into your room while it is being vented. This product also features fuzzy logic capabilities for use with CO2 regulators. Enclosure resists dust, rust and moisture. 10 Amps maximum/ 120 V/ 60 Hz.