GRÄSSLIN 18.18.0013.1 Turnus 501 A - Analogue Twilight Switch with External Brightness Sensor for Outdoor and Indoor Use with Built-In Light Sensor I 2-2000lx I 1CH I 1TE : Amazon.de: DIY & Tools
turnus 501 A - Grässlin Zeitschalttechnik GmbH
User manual Grässlin turnus 501 E (English - 2 pages)