DELAY TIMER RELAY : Delay Relay Module adopts high-quality components and has stable performance and simple operation. APPLICATION : It could be widely used in a variety of control situations that require delay self-locking. FUNCTION : With delay ON, delay OFF, self-locking and trigger delay function. The module is preset with 4 functions to meet a variety of application needs, and can customize and add other specific functions as user needs. FEATURE : With power supply anti-reverse function to prevent damaging the module. The parameters can be saved, and the setting contents are not lost when power off. DELAY TIME : The delay time can be arbitrarily set between 0.1 seconds and 120 seconds.