Operating Voltage: 5V / 12V / 24V (varies by module type) Relay Type: SPDT (Single Pole Double Throw) Control Signal Voltage: 3.3V–5V (compatible with Arduino, Raspberry Pi, etc.) Relay Switching Capacity: AC: Up to 250V AC, 10A DC: Up to 30V DC, 10A Trigger Mode: Active High / Active Low (depending on module) Optocoupler Isolation: Yes (provides electrical isolation between control and load circuits) Indicator LEDs: Power and relay status indicators Interface Pins: VCC – Power Supply GND – Ground IN – Control Signal Input
