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8 output channel, 5V board working voltage, optocoupler isolation and strong anti-interference ability. This relay module can be, for example, easily switch large loads with a microcontroller ((Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)). All connections for driving the relays are brought out to a pin header. The control LEDs light up when the relevant relay is triggered. Equipped with high-current relay, AC250V 10A; DC30V 10A