CO2 is scientifically proven to improve the performance of your plants! The LTL Controls CO2 Generators provide a clean and efficient way to enrich your grow area with CO2. LTL Controls CO2 Generators come with everything you need to get your CO2 system started. Each LTL Controls CO2 Generator package includes: CO2 Generator, AC Power Supply, Hanging Chain, Ceiling Hook, Hose, and Gas Regulator. All you need to provide is a Propane Gas source! This LTL Controls CO2 Generator is recommended for use in low altitude applications (0-3500ft).