This 2 Channel 12V Relay Module with Optocoupler meets the safety standard as the control and load areas have isolation grooves. Optical coupling isolation module. The triggering of this 2 Channel Relay Module is reliable, more stable. The double FR 4 circuit board design, high-end SMT process. It has power and relay operation instructions. Relays terminals (C, NC, NO) are accessible through screw terminals, making wiring up the board very easy.
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