The MKR Relay Prototyping Shield allows you to easily control relays with your MKR board. The shield provides two on board relays and a small prototyping area if you need to add some other component to your project. The shield provides two relays called RELAY1 and RELAY2 commanded by pin 1 and pin 2 respectively. The shield also provides easy connection by means of screw terminal blocks to A1 through A4 analog inputs, I2C and supply voltages.
Operating voltage 3.3V (supplied from the host board)