... 3. 2- or 1-Time plus 1 Instantaneous Contact 4. up/down timing TH100 programmable timer1. reset function2. microprocess3. 2- or ... 1-Time plus 1 Instantaneous Contact 4. up/down timingFeatures : 1)8 bit micro-computer control, 1~2 ... switch buttonDisplay units4-digit LEDOutput mode optionalOne group of relay pick-up;Pause, zero, reset functionTiming unit optional0.01s, 0.1s, 1s ...