Four way Solid State Relay Module For Arduino Description: 5V Omron solid state relays 240V / 2A, output with resistive fuse 240V / 2A. Dimensions: 57x55x25 (length x width x height). Input Power: 5VDC. Control signal input voltage: (0-2.5V low state relay ON) (3-5V state high relay OFF) . Voltage:5V . Quiescent current: 0 mA . Operating current: 12.5mA . Trigger Voltage: 3.3-5V . Trigger current: 2mA .DC +: positive power supply (according to the relay voltage supply). DC-: negative power supply. CH1: relay module signal triggering end (low to trigger active) . CH2: relay module signal triggering end (low to trigger active) . CH3: relay module signal triggering end (low to trigger active) . CH4: relay module signal triggering end (low to trigger active) . Package included: 1 x Four way Solid State Relay Module For Arduino