The portable machine adopts imported convection technology, capable of constant heating. Interactive operation interface available, fashionable design with fine piano varnish convenient for deletion. 3.5 inch TFT LCD display with easy operation, back-lighting function allows night operation. Respiratory waveform and standard waveform display can achieve real-time monitoring of CPAP. Ultra silent design and step time design in delay time. The Bipap machine is working to achieve human-computer synchronization.