Oxygen-Pro Programmable Air Freshness System - Cartridge (Glow) Glow Favour Juicy black cherries, hints of almond and plum on a background of vanilla and cinnamon spice Oxygen-Pro Cartridge information When using the cartridge, the dispenser can be programmed to work for 30 days, 60 days or 90 days. The cartridge contains 35 ml of pu...