Oxy-Gen Powered is the only technology that guarantees the delivery of fragrance in the air continuously, consistently and accurately for the entire duration of the cartridge life. Oxy-Gen Powered technology is simple, reliable and cost-effective. Oxygen-Pro is the perfect odor control system for any establishment as the user can program the dispenser to work for 30, 60 or 90 days, and can select different fragrance intensity levels with the flexibility of two different cartridge sizes to choose from.       Economical The Regular cartridge works for 30 days and is the ideal choice to replace aerosols, gels, sprays or other passive systems. The cartridge contains 20 ml of pure fragrance oil which amounts to about 4 times more fragrance oil than a standard metered aerosol can.   Lowest Cost-in-use When using the Grande cartridge, the dispenser can be programmed to work for 30 days, 60 days or 90 days. The cartridge contains 35 ml of pure fragrance oil, that is approximately 7 times more fragrance oil than a standard metered aerosol can. The fragrance intensity can be changed to a strong (30 days), normal (60 days) or (90 days) mild scent.