5V 4Ch Solid State Relay Module.
5V Omron solid state relays 240V / 2A, output with resistive fuse 240V / 2A.
Quiescent current: 0 mA
Operating current: 12.5mA
Trigger Voltage: 3.3-5V
Trigger current: 2mA
DC +: positive power supply
DC-: negative power supply
CH1-CH4: relay module signal triggering terminal (active high)