Fully automatic, accurate humidity control. The Cigar Oasis Magna uses the original Cigar Oasis technology with a unique sensor to accurately control humidity in large enclosures, such as 4ft x 6ft x 2ft point of sale display cabinets used in retail stores or designer armoire humidors for cigar aficionados, and other such humidors up to 60 cubic foot volume. The Cigar Oasis Magna is made up of two sections: The water reservoir with a block of foam and the control top which contains the electronics with sensor, control blower and circulating fans. The humidity control is preset at the factory at 70% but is adjustable to suit your needs. The circulating fans run continuously to keep the flow of air moving in the enclosure and when the humidity drops below the set point, a red LED light turns on and the control blower turns on to humidify the enclosure. The Cigar Oasis Magna should be filled with distilled water prior to use and when the red light stays on for an extended period of time, it needs to be refilled.