Product Name: Endoscopy Nasal Mask Function： The patented Gastrointestinal Endoscopy Nasal Mask is an innovative interface to provide supplemental oxygen to patients. This mask contributes to a significant reduction to the incidence of rhinitis symptoms after a gastrointestinal endoscopy with sudation. Instruction for Use : 1. Place the nose mask over the patient's nose and place the elastic band over the back of the head to adjust the proper tightness. 2. Connect the oxygen tube to the mask connector. If you need to connect the anesthesia tube, you can use it together. 3. There is a CO2 detection side hole under the mask, which can be used together. Warning： 1. The product is used by a single patient. 2. Please make sure all parts are connected before use. 3. This instruction is only a general indication, and it still needs to be used by professional medical personnel. 4. Please confirm the appearance of the package and the product before use. If it is damaged or damaged, please do not use it. 5. The maximum recommended life of this device is 7 days. 6. Dispose of in accordance with the local medical waste disposal regulations. Specification： Valid period: 3 years