instrumentfeature：
High performance air pump
Strong load capacity, accurate high flow rate
Long working hours
Small size and light weight

Technical Specifications：
1. Load capacity ≥ 5.0L/min (1000 Pa negative pressure)
2. Flow range 1.0~5.0L/min
3. Flow stability ≤ 5% within 8 hours
4. Flow error ≤ 5%
5. Timing range 0-24h, 59 min, error ≤ 0.1%
6. Continuous working time ≥ 8 hours
7. Working temperature: 0-40 ℃
8. Power supply 7.4V lithium-ion battery pack
9. Dimensions 100 × 52 × 152mm
10. Host weight 500 g