Electronic Astro Timer with weekly program for rail mounting, 1 analog output: 0-10 V or PWM, 1 changeover contact for 16 A / 250 V AC (AC1), supply voltage: 110-230 V AC/DC, LCD display, joystick programming or programming via an NFC-enabled smartphone using the Finder Toolbox app (Android and iOS). After installing the Finder app, an existing program can be read out or a new program can be created with maximum flexibility. To transfer data, the timer is touched with the smartphone. Astronomical time control through automatic switching at sunrise and sunset based on postal code or geographical coordinates, selectable time offset for sunrise and sunset times, as well as turning on and off during the astro switch-on time. Contact material AgSnO2, max. inrush current 120 A for 5 ms, shortest switching time 1 minute. Max. switching capacity at 230 V AC1: 4000 VA, compatible with power supplies/ballasts with 0-10 V or PWM inputs or slave dimmers of type 15.11, safe separation between power supply and contacts.