Module Features: 1, SW-420 using normally closed type vibration sensor. 2, the comparator output, the signal is clean, good waveform, strong driving ability, exceed 15mAh 3, operating voltage 3.3V-5V 4, Output form: Digital switching output (0 and 1) 5, a fixed bolt hole for easy installation 6 small board PCB size: 3.2cm*1.4cm 7, Wide voltage LM393 comparator
