Titan Controls Eos 2 - Digital Humidity Controller The Eos 2 is a simple to use digital humidity controller. It can be used to either humidify or dehumidify your growing environment. The knobs allow you to easily set day and night humidity levels. Plastic enclosure protects internal components from dust rust and moisture. A range of 20% to 90% covers the sweet spot for your plants! 15 Amps maximum/120 Volts/60 Hz.