KNACRO 5V Delay Controller Delay-off on-off cycle of the external trigger delay time is adjustable switching relay module Support pulse signal, and the signal pulse width can be determined that the completion of a valid trigger. Support edge signal, can count on the edge of the signal reaches the value set by the user to complete a valid trigger. Four digital display settings, the delay time information, energy-saving standby automatically turns off. High-performance on-board power systems interference, supported reverse chip protection. All copper port will never rust, large current does not heat. Longest delay time of 5999 minutes, minimum 0.1 minutes. (0.1 seconds to 99 hours).