1. Set tired function via the display show the total work time.
2. Set the sleep timer function, easy to use.
3. Equipped with a barometric pressure of pressure relief valve, more security.
4. Set the power off alarm, power outage in the course of their work reminds the user or caregiver.
5. The design pressure, circulatory failure alarm function.
6. The design of the compressor concentration alarm function.
7. The design of a low oxygen concentration alarm function.