Digital weekly timer with integrated Bluetooth interface and input for light sensor for app programming with smartphone or tablet via the 'DBT Timer' app. Light sensor for wall mounting included. Potential-free changeover contacts for time-dependent control of operating resources. Programming of daily, weekly, holiday, impulse, cycle and random programs with up to 900 memory locations. High security thanks to sealable transparent cover and access protection via PIN code. LED load up to 500 W switchable. Backlit display and automatic changeover from summer time to winter time.