2-Pack Ultra 555 Timer 5V Delay Self-Locking Trigger Relay Module - DIY Electronics Projects, Circuit Prototyping & Automation Control

Product Description

1. With delay pull, delay off, self-locking and trigger delay function; 2. With anti-reverse power function, then reverse power supply will not damage the module; 3. Timing time can be arbitrarily set between 0.1 seconds -120 seconds; 4. Parameters can be saved, set the contents of power-down is not lost.