Features:
1.Large-capacity battery, long working time for 40 hours.
2. Built-in Lithium battery, Type-C interface charging.
3.LED digital tube displays respiratory rate and alarm.
4.Available to measure respiratory rate.
5. Apnea alarm, Exceed-limit alarm.
6. Apnea with Audible alarm.
7. Respiratory rhythm sound.
8. Automatic wake up breathing, automatic shutdown without breathing detection.