Features:
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
Proto area