4pcs Modulo Relè DC 12V Scheda Relè 1 Canale con Optoaccoppiatore Isolamento Sup...
4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level. Jumper Design: The Relay Module has a Jumper That You Can Set Rather the Unit State Changes with High or Low Signal.