Product Name: Bubble Humidifier Product code: 23002 / 23003 / 23004 Intended Use: The Bubble Humidifier is a disposable, single-patient use device. The Bubble Humidifier is intended to providing additional moisture to breathing gases to supplemental oxygen therapy. Instruction for Use: 1. Add water to the appropriate level of the humidifier. The water volume should not exceed the upper limit of the water level and the top cover of the humidifier should be locked. 2. Connect the humidifier to the flow meter (or the appropriate device) and the other port of the humidifier can be connected to a suitable oxygen nasal cannula or mask for patient use. 3. Adjust the appropriate oxygen flow for patient use. Warning： 1. The product is for single patient use, the maximum recommended is 7 days. 2. Please confirm the integrity of all parts and packaging before use. If there is any doubt or damage, please DO NOT use this product. 3. This instruction is only a general indication, and it still needs to be used by professional medical personnel. 4. Dispose of in accordance with the local medical waste disposal regulations. 5. The device is for single use only. Any modification, rework, or sterilization will result in device malfunction or failure; and will also increase the risk of cross-infection of disease. 6. Discontinue use if discomfort occurs, and consult your physician. Specification： 1. Pressure relief: 2PSI / 4PSI / 6PSI 2. Interface: DISS threaded interface 3. Volume: 500 ML 4. Oxygen tube interface: 6mmOD Manufacturing date: 2018/07/23 Expiratory date: 2021/07/22 Manufacturing lot: 180723