5/12/24V 1/2/4/6/8/16 relay module 8 channels, with optocoupler relay output 1 2 4 6 relay module 8 channels Low level trigger

5/12/24V 1/2/4/6/8/16 relay module 8 channels, with optocoupler relay output 1 2 4 6 relay module 8 channels Low level trigger