The Kronus 3 controls temperature (day & night) and CO2 in your grow area at your preferred settings. The ‘CO2 ON’ feature is only activated during daylight periods to dose CO2 when your plants are able to uptake it, and is disabled during the nighttime hours or when the temperature exceeds your preferred settings. The built in ten (10) minute ‘CO2 delay’ feature deactivates CO2 equipment if the day temperature setting is exceeded. The ‘Night Only’ output allows use of a nightlight or circulation fan. The ‘Night Heat Output’ is used to plug a heater into to keep your plants from getting the night chills. The Kronus 3 is the ultimate in temperature controls! Controls day and night temperature and CO2 in your garden. Activates 'CO2 ON’ outlet only during daylight hours. Ten (10) minute ‘CO2 delay’ feature allows maximum CO2 coverage with minimum CO2 waste. Features a ‘Night Only’ and ‘Night Heat’ outputs to assist the gardener with the maintenance of the garden after the lights have turned off. Easy to understand and use with highlighted ‘Grow Zones’. 25 foot modular remote temperature sensor. Improves your yield by creating the perfect environment for your plants. 15 Amps/120 Volts/60 Hz. 3 year warranty.