DC 5V/12V/24V Delay Timer Relay Self locking Delay On Off Time Switch Super 555 Timer DC 5V/12V/24V Delay Timer Relay Self locking Delay On Off Time Switch Super 555 Timer TRM01 Delay Relay Module adopts high-quality components and has stable performance and simple . It could be widely used in a variety of control situations that require delay self-locking. 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. Features: 1.With delay ON, delay OFF, self-locking and trigger delay function. 2.With power supply anti-reverse function to prevent damaging the module. 3.There are three working voltage versions of 5V/12V/24V for users to choose from. 4.The delay time can be arbitrarily set between 0.1 seconds and 120 seconds. 5.The parameters can be saved, and the setting contents are not lost when power off. Specification: Working voltage: DC 5V, 12V, 24V (Optional) Working current: