12V Relay Module With Optocoupler for PIC AVR DSP ARM Arduino 1/2/4/8/16 Channel

1 CH Optocoupler(Blue). onboard EL817 optocoupler, strong anti-jamming capability with optical isolation. 2 CH Optocoupler(Blue). onboard EL817 optocoupler with optical isolation anti-jamming capability.

eBay