Relay power supply voltage: 5V Relay drive level: 5V TTL level high level drive Applications: small signal large signal situation. For example: intelligent Home Furnishing industrial control equipment modification. Electric capacity (controlled signal power): 30V 10A 250V 10A AC or DC Electric shock: a normally open contact a normally closed contact. (for details see PCB screen diagram) Indicator: a power indicator light two signal indicating lamp. (attraction signal Deng Liang) Drive circuit: transistor drive circuit the control pin is high impedance requires only minimal driving current. About 5mA Relay control signal down to prevent false triggering relay. PCB color: white PCB brief appearance. PCB positioning hole: 3mm standard positioning hole install 3mm standard copper screws.