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4-Channel 5V Opto-isolator Relay Module High Level Trigger - Blue
Contact capacity: AC 250V 10A£¬ DC 5V 10A; Wire connection as following: 1.VCC to positive wire. 2.GND to negative wire. 3. IN1-IN4 is signal input trigger end£¬ only high level trigger effect. 4. VCC1: relay module power supply.