Knock Sensor Module with LED

Specification:
1. Weight: 3g
2. Main color: Black
3. Size: 30x18x6mm (approx)
4. Type: voltage regulator
5. Application: DIY; electronic products; STEM education
6. Pin numbers: 3 pin
7. Knock sensor module and a digital 13 interface, built-in LED a simple circuit to produce         percussion flasher.
8. Interface comes with digital LED, will knock sensor connected digital 3 interface, when    percussion sensor senses measure to percussive signals, LED flashing light.