["Relay! The MKR Relay Proto Shield allows you to easily control relays with your MKR board. The Shield offers two on-board relays and a small prototyping area if you want to add another component to your project. Arduino® MKR Relay Proto The MKR Relay Proto Shield allows you to easily add relays to your MKR board based project. The shield provides two relays called RELAY1 and RELAY2, controlled by pin 1 and pin 2 respectively. The shield also allows for easy connection via screw terminals to A1 to A4", "Operating voltage 3.3V (supplied from the host board)", "Two relays with NO , COM and NC connections", "Works with battery powered board", "8 positions screw terminal blocks for easy connections with A1 to A4 Analog input, SCL SDA for I2C, GND and 3.3V output", "6 positions screw terminal blocks (NO, COM, NC for each relay)", "Carry current: 2 A", "Max. operating voltage: 24 VAC, 50 VDC", "Max. operating current: 1 A", "Max. switching capacity: 62.50 VA, 30W", "Protoarea"]