Applications: It is used for regular room ventilation, cyclic dehumidifi cation, light control, circulating pumps, noon signs, etc. GRT8-S1: one group groups of contacts working in a cycle at the same time Function Features: Voltage AC230V or AC/DC12V-240V Output 1SPDT (16A/AC1) 2 time functions: Cycler beginning with pulse,Cycler beginning with pause Function choice is done by an external jumper of terminals S-A1. Time scale 0.1 s - 100 days devided into 10 time ranges: (0.1 s - 1 s / 1 s - 10 s / 0.1 min - 1 min / 1 min - 10 min / 0.1 hrs - 1 h/ 1 hrs - 10 hrs / 0.1 day - 1 day /1 day - 10 days /3 days - 30 days /10 days - 100 days). Relay status is indicated by LED. 1-MODULE,DIN rail mounting. Color: White Material: PC Package Contents: 1 x Timer Relay Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.