The Secure Horstmann Immersion Heater Controller Smart Timer Bluetooth E7+ is a programmable thermostat designed for home heating systems. With a sleek white rectangular shape and wall-mounted installation, this controller offers advanced features such as digital display, timer functionality, and app control. Operating on a corded electric power source and utilizing Bluetooth technology for smart home connectivity, this unit allows for easy adjustment of the thermostat settings and provides efficient control over your heating system. The programmable 7-day schedule and temperature sensor technology ensure optimal comfort and energy savings in your home.