My input LED (4x 230V GU10 LED) is controlled by this clock block manner. The operation is almost self-explanatory. At the top of the day shift time is displayed by 24 bar. The backlight can be set to on, off, or when pressed. There are several blocks, for example. Mo-free + Sat-Sun or Mon-Sun or daily. The integrated battery / battery the settings are retained. Steep price, but worth every penny.