12V LED Display Automation Digital Delay Timer Control Switch Relay Module

Features:
New upgrades to simplify, meeting the users' needs.
Increase the power supply anti-reverse function.
The use of opto isolated input and output, enhanced anti-jamming capability and consumption.
The last setting parameters can be memorized after power off.
Signal terminal voltage signal can be maintained for a long time.
To ensure stability, industrial grade PCB board.