Relay Module 2-Ch 12V with Optocouplers.

Double relay module.
Inputs Gnd, Vcc (12Vdc), channel 1 signal, channel 2 signal. Channel activation HIGH/LOW selectable by jumper links - 5V logic compatible.
Channel signals are optically isolated from the relay coils.
3-way terminal blocks connect to SPDT changeover relay contacts.
Relay contacts rated at 10A 250Vac, 10A 30Vdc.
Relay coils 400mW each.
Dims - 50.2mm(l) x 41mm(w) x 17mm(h). 4 x 3mm fixing holes.