JanSan Oxygen-Pro Odour Control System Oxygen-Pro is a continuous fresh scent and odour control system that is reliable, effective, safe and eco-friendly. Oxygen-Pro is the only technology that delivers fragrance into the air continuously, consistently and accurately for the entire duration of the cartridge life, and without the use of aerosols. This precision oil delivery system is based on a fuel cell technology that is used in the pharmaceutical industry to deliver drugs to patients. Another great feature of the product is the management and reminder system as it alerts when the cartridge or batteries need replacing. Oxygen-Pro is the perfect odour control system for any environment and can be programmed to work for 30 days for high intensity, 60 for normal intensity or 90 days for low intensity. The cartridge contains 35ml of pure fragrance oil, which is around seven times more fragrance oil than a standard metered aerosol can. Oxgygen-Pro cartridge fragrances (sold separately) are