Rain drop Sensor ModuleWorking voltage 5VOutput format: Digital switching output (0 and 1), and analog voltage output AOPotentiometer adjust the sensitivityUses a wide voltage LM393 comparatorComparator output signal clean waveform is good, driving ability, over 15mAAnti-oxidation, anti-conductivity, with long use timeWith bolt holes for easy installationSmall board PCB size: 3.2cm x 1.4cm