this is a basically new titan controls Atlas 2 professional CO2 monitor and controller. This controller makes it very easy by already being preset so you don\'t have to adjust anything just plug it in and let it go. I bought this thinking I was going to do a sealed room but ended up doing hi Air change instead.so this CO2 controller never got used, I have tried it out it works great and it still has over half of its warranty left.If you have any questions please ask. Thank you

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