The Saturn 4 is a basic environmental controller. ItÕs digitally precise with easy to use knobÕs to dial in your desired temperature and humidity settings. Will operate a CO2 controller, fan, dehumidifier and a Ônight onlyÕ device to keep your garden flourishing. One button allows you to change between three different operating modes. Comes with a 15Õ remote sensor and a photocell for nighttime control. Plastic enclosure protects internal components from dust, rust and moisture. 15 Amps/120 Volts/60 Hz. 3 year warranty.