Introducing the NEW Cigar Oasis XL Plus Electric Humidifier for mid-size humidors. Guaranteed to keep your cigars fresh day after day! The Cigar Oasis XL Plus electronic cigar humidifier is designed for large desktop humidors, cigar end tables, chests and other cigar enclosures which house from 300 to 999 cigars. *The Cigar Oasis XL Plus is designed for larger humidors and small to medium sized cigar cabinets or enclosures. This unit can maintain 300-999 cigars or between 4-10 cubic feet. Cubic feet of your humidor can be calculated by multiplying (width in feet x depth in feet x height in feet) of your interior space.