45% drop
Spirometer Peak Speed Meter Expiratory Peak Flow Meter Monitoring Lung Breath
$11.28$20.35(-45%)
- Vital capacity (VC) refers to the total amount of gas that can be exhaled at a time when you try to breathe in. Adult men's vital capacity is about 3500-4000 milliliters, and women are about 2500-3000
Set alert threshold:
10%