Application: 1: People with vascular disease
2: Seniors over 60
3: Insufficient oxygen and inadequate oxygen supply.
Suitable for oxygen bar, community medical, family, sports health (used before and after exercise, not recommended during exercise), outdoor activities.

Features: 1: Compact design, comfortable to wear on the patient's hand, one button can be operated.
2: Small size, light weight and easy to carry.
3: Two AAA batteries can work continuously for 15 hours.
4: When the battery is low, the battery indicator icon on the top of the screen blinks, which may affect normal work.
5: No routine maintenance and calibration required.
6: Automatic shutdown in 8 seconds when no signal is generated
7. Four directions display