Feature Using sensitive photosensitive resistance sensorThe comparator output signal is clean good waveform driving ability more than 15mA With adjustable potentiometer to adjust the brightness of the light measuringThe working voltage 3 3V 5VThe output form DO digital switching outputs 0 and 1 and AO analog voltage outputA fixed bolt holes for easy installationPCB Size 3 2cm x 1 4cmUsing a wide voltage LM393 comparatorPackage included 20 x 4 PIN Photoresistor Sensor Module