•IT is not recommended to use this product under the condition of low oxygen, heavy air pollution, poor breathing or during sleep.
•For patients with severe asthma or other severe respiratory diseases, please use with caution.
•Please use the mask properly, Do not modify or misuse it at will to avoid serious consequences cause by improper usage.
•Store in an environment with the temperature of - 20 to 38 degree Celsius and the relative humidity of the environment shall be lower than 80%.