5V 4 Channel Relay Module 4-channel Relay Control Board For ArduinoRelay Module With Optocoupler Relay Output 4 Way Amtech Resistance Range: 200Ω → 2MΩ

Resistance Range: 200Ω → 2MΩ (±1

installed and work

low noise receive amplifier

🔹 Important Notes

5V 4 Channel Relay Module 4-channel Relay Control Board For ArduinoRelay Module With Optocoupler Relay Output 4 Way Amtech Resistance Range: 200Ω → 2MΩ4 channel relay module relay expansion board for arduino 5V low level triggered 4 way relay module Details: 1. PCB Color: Black 2 board four weeks with four screws holes, hole diameter 3. 1mm, easy to install and fixed 3 relay of high quality loose music relays SPDT. A common terminal, a normally open, one normally closed terminal 4 optocoupler isolation, good anti jamming 5 low pull, high release. Energisation status indicator light, release status