Oxygen flow control regulator is intended for the administration of oxygen to patients who need increased oxygen levels to improve their breathing conditions. The device is designed to reduce pressure from a cylinder to levels which can be safely used by the user and deliver the prescribed flow rate to the patient on a continuous basis. In addition, some models may be used in emergencies. Humidification bottle is an important device for oxygen absorption, the humidification liquid in the humidification bottle during oxygen absorption can humidify the oxygen, reduce the stimulation of dry oxygen on the respiratory mucous membrane, and can improve the oxygen therapy effect and patient comfort. Swivel nipple connector is barbed for leak free coupling. It is standard size and easy to attach.