Weekly time switch, 1 changeover, 16A, 2 PLE, digital including Bluetooth programming key. This set consists of a digital weekly time switch with one channel and a Bluetooth programming key. The digital weekly timer features a display for time-dependent control with a changeover contact, and app programming is possible. Programming on the device includes time and date (factory set), automatic summer/winter time changeover, and temporary and permanent exception control for On/Off. The keypad is lockable via a key combination. A bar display allows for quick recognition of daily programming. Programming is possible without mains voltage thanks to an integrated power reserve of approximately 5 years. Note: Bluetooth programming is available via the app when the key is in the watch. Key communication protocol from version Bluetooth 4.2.