Titan Controls Zephyr 3 40°F to 100°F gives the grower a great range of temperature settings for their garden. Precise temperature control of your grow room heating and cooling equipment. Built-in 4°F split differential maintains garden in the proper temperature zone. Durable powder coated steel chassis will stand up to the toughest conditions. Change from 'Heating' to 'Cooling' mode with a flip of the switch. Discrete green light indicates that equipment is operating. ETL listed for use in commercial applications. 15 Amps/120 Volts/ 60 Hz. Made in the USA! 5 year warranty.