water bottle air humidifier cup for oxygen concentrator generator concentra machine

100% new and ootdty feature: made of pc material with good sealing performance and long life. the safety oxygen air-humidifying bottle valves act as warning devices. it will make a special sound when excess pressure is released to the atmosphere. if this happens, check the humidified oxygen tube to ensure that there is no nodding or clogging before resuming use of the humidifier. oxygen humidizer bottle only, other accessories demo in the p is not included.