Electronic astro timer with weekly program for series installation, 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 with the Finder Toolbox app (Android and iOS). After installing the Finder app, an existing program can be read out or new programming can be carried out with maximum flexibility. To transfer the data, the timer is touched with the smartphone. Astronomical time control through automatic switching at sunrise and sunset via zip code or location coordinates, selectable time offset of the sunrise and sunset times and switching 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