Controls CO2, Day/Night temperature and humidity in your garden. Activates CO2 ON outlet only during daylight hours. Features programmable delay. Ten (10) minute CO2 delay feature allows maximum CO2 coverage with minimum CO2 waste or can be set for use with bottled CO2. Features a Night Only output to assist the gardener with the maintenance of the garden after the lights have turned off. Easy to understand and use highlighted Grow Zones. 25 ft modular remote temperature and humidity sensor. Improves your yield by creating the perfect environment for your plants. 15 Amps maximum/120 Volts/60 Hz.