Suitable for people who have obstructive sleep apneahypopnea syndrome (OSAHS), chronic obstructive pulmonary diseases (COPD), asthma, vascular disease or people over 60 years old. For hospital and home use. Features: - wrist-design, small In volume and light in weight - integrate multi-function in one device, convenient to know more physiological information - display at SpO2, PR, pulse sound, bar graph - display of pulse and nasal airflow waveform - alarm for low-power, finger-out and over-limit - adjustable screen brightness - real-time clock - auto-power on/off - record data in continuous 20 hours - upload data by USB to PC - PC analysis software