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Color: Blue- Material: PCB- Sensitive photo resistor sensor with relay£¬ direct control the load- Output mode: Direct connect to AC 220V 10A load or DC 30V 10A load- With adjustable potentiometer for adjusting sensitivity- Working voltage: 5V- With 4 fixed screw holes for easy installation- Using wide voltage LM393 comparator- Photo resistor sensor with relay module for street lamp and DIY projects etc.