Applications: Used for regular room ventilation, dehumidification, light control, circulating pumps, and time-based switching. GRT8-S1: One group of contacts operates in a cycle simultaneously. Function Features: Voltage AC230V or AC/DC12V-240V. Output 1SPDT (16A/AC1). Two time functions: Cycler starting with pulse, Cycler starting with pause. Function selection via external jumper on terminals S-A1. Time range 0.1 seconds to 100 days, divided into 10 adjustable ranges: (0.1 s – 1 s / 1 s – 10 s / 0.1 min – 1 min / 1 min – 10 min / 0.1 hr – 1 hr / 1 hr – 10 hr / 0.1 day – 1 day / 1 day – 10 days / 3 days – 30 days / 10 days – 100 days). Relay status indicated by LED. 1-module design for DIN rail mounting. Color: White. Material: PC. Package Contents: 1 x Timer Relay. Only the listed item is included; other items are not part of the package. Note: Lighting and display differences may cause slight variations between the product color in images and actual color. Measurement tolerances may vary by +/- 1-3 cm.