Useful 380V 8A 1/2/4 Channel High Low Level H-L Trigger Board D3808 for Arduino

Theory: Solid State Relay. 1 x 1 Way Relay Module. 1 x 2 Way Relay Module. 1 x 4-Way Relay Module. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.

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