Product features:Staircase light timer Electronic control Time setting: continuously variable up to 12 min. for 3-/4-wire circuits (automatic detection) 3-/4-wire circuits can be switched on or switching time can be extended (3-wire circuit only when replacing devices in existing installations) Installation in electrical distribution (standard rail) Switch-off warning in accordance with DIN 18015-2, 1996-08 (flickering several times approx. half a minute before the time expires) Switch-off warning can be switched off Continuous light function can be set on the light button or on the stairlight timer Contact switching at zero crossing to protect contacts and lampsTechnical specifications:Operating voltage 230V~ / 50 Hz Contact load: 16A, (one normally open contact) Control voltage: 8 - 230V~/= and 230V~ Glow lamp current max. 0.15A max. illumination: incandescent. 3,000W, energy saving 700W, fluorescent tube 500/1,000W (compensated/uncompensated). We recommend using incandescent lamps for stairwell lighting! Temperature range: -10°C to +40°C 82 x 18 x 55 mm (1 module width) Installation instructions:Note: