1 Piece Relay Module Board With Optocoupler Self-Locking Timing Relay DC 8V-36V 4 Channel Multi-Function

       1. Linkage function of each channel;   2. With 4 channels of input and output control, each channel can be set with 20 functions to meet more application requirements;   3. DC 8V-36V wide voltage input, with power supply anti-reverse connection function, will not damage the module due to wrong power supply;   4. With power indicator light, relay pull-in indicator;   5. At least 1 second timing function can be set, and the timing accuracy is better than 1%;      6. Increase the automatic power saving function;   7. All setting options can be saved automatically, and the setting contents will not be lost when power is off;   8. The trigger signal input terminal supports user selection, high level or low level pulse triggering;   Colour:As Shown   Material:PCB      Package Contents:   1 x DC 8V-36V 4 Channel Multi-function Relay Module