This product is a new digital LED countdown display 12v delay module module. It can be widely with various control switch places. * Products can set the delay time, can press "set" buttons. After setting up, power-up setting value is previous setting delay time as we set last time (power-down memory function) * LED digital display, normally open trigger delay 12V relay module, triggered by an external signal * modules are high level trigger, counting time 0-999 seconds * The wide range of products can be used in many fields