There are many types of humidifiers, oxygen tubing and cannulas/masks which can be used with this product. Specified humidifiers and accessories could impair the product’s performance. Never allow cigarette smoking or open up flames within 2m (6.56ft) of this unit though in use. If you feel sick or awkward, or https://allhealthmarket.com/product/medical-supplies/portable-oxygen-concentrator-generator/oxygen-concentrator-machine-camping-use-oxygenator-driving-oxygen-bar-with-24-hours-battery-lasting-oxygen/