Features:
- The brightness of surrounding environment and the light intensity can be detected (compare with the photoresistor, directivity is relatively good, can perceive the fixed direction of the light source) 
- Sensitivity adjustable the blue digital potentiometer adjustment 
- Operating voltage 3.3V-5V 
- Digital switching outputs (0 and 1) 
- With fixed bolt hole for easy installation 
- Small board PCB size: 3.2cm * 1.4cm / 1.25" * 0.55" 
- DO port outputs a high level, when the external environment when the light intensity exceeds the set threshold value, the module D0 output is low