The Tastor Centrum is a versatile roller shutter timer with integrated radio receiver for Mercato 433 transmitters. The time switch has a daily, weekly and astroprogram as well as an automatic summer/winter time changeover. The operating surface has the format 50 x 50 and can be integrated in many common switch programs with the help of the respective intermediate frame. The display and the white-background control panel are covered with a Plexiglas window, which provides for a high-quality yet simple look. Operation is child's play and the menu-driven setting is clearly arranged and easy to understand. The display shows at any time which mode the tracer is currently in (manual, automatic, Astro, random). Through the integrated radio receiver it is possible to program a single or multi-channel hand-held transmitter of the Mercato 433 series in order to be able to switch several Tastor Centrum in the whole house together or in groups without additional cabling. The Astro function offers