Model: SW-420 - Quantity: 1 - Material: PCB board - Working voltage: 3.3V~5V - Current: > 15mA - Uses SW-420 normally closed vibration sensor module - Digit switch output: 0 1 - Uses LM393 comparator - Green light on when vibration switch is under closed conduction state and the output terminal is low - Green light off when vibration switch is disconnected and the output terminal is high - Great for microcontroller experiment - Output terminal can be connected to microcontroller to test electric level and if the environment is in vibration alarm function - Suitable for a variety of vibration triggering functions theft alarm smart car earthquake alarm motorcycle alarm etc.