DELAY ON AND OFF: Delay time relay has on-delay, off-delay, self-locking and off-delay function. ANTI-CSR FUNCTION: This timer has the anti-power reversal function to avoid damaging the module. THREE VOLTAGE VERSIONS: There are three working voltage versions of 5V/12V/24V compatible users to choose from. SET DELAY DELAY: The delay time can be arbitrarily set between 0.1 seconds and 120 seconds. SET DELAY DELAY: The delay time can be arbitrarily set between 0.1 seconds and 120 seconds. delay timer relay on/off controller switch board module trigger auto-lock power supply anti-reverse function set way Features: 1. With delay on, delay off, self-locking and trigger delay function. 2. With power supply anti-reverse function to prevent damage to the module. 3. There are 5V/12V/24V three versions of working voltage compatible users to choose from. 4. The delay can be arbitrarily set between 0.1 seconds and 120 seconds. 5. Parameters can be saved and setting contents are not lost when power off. Specification: Working Voltage: DC 5V, 12V, 24V (optional) Working Current: