Circuit Make/Break Detection Board Test Alarm Board

SKU: KNDTM1901
Worldwide Free shipping
Delivery date: 7 days
$4.61
Availability: 91 in stock

Circuit Make/Break Detection Board Test Alarm Board

Features:

- With remarks on each interface
- Potentiometer is to adjust inner sensitivity
- If less than 100ohm, buzzer works
- SO port output low level