SAMIORE ROBOT 4 Channel Relay Module 4-Channel Relay Control Board With Optocoupler. Relay Output 4 Way Relay Module For Arduino  (Multicolor)

SAMIORE ROBOT 4 channel relay module 4-channel relay control board with optocoupler. Relay Output 4 way relay module for arduino 4-channel relay output modules If you want anything which can not find on our store. Welcome to contact us !We still have most parts don't published on line!Thanks! 4-channel relay output modules, relay output contacts 250A 10A. Input IN1, IN2, IN3, IN4, the signal line LOW effective. VCC, GND power input, can relay a separate power supply relay power input of JD-VCC. Uses: 1, support all MCU control. 2, the industrial sector; 3, PLC control; 4, smart home control;