The Honeywell ST699 Programmer is a 7-day programmable thermostat designed for central heating radiators. With a sleek white rectangular design, this electric-powered thermostat is made of heat-resistant plastic and can be wall-mounted. It offers automatic system switching and digital control style for easy programming. Compatible with various smart home systems, including Bluetooth and Bluetooth Low Energy (BLE), this programmable thermostat provides efficient heating control for your home. Powered by AA batteries and operating at 230V Line Voltage, the Honeywell ST699 is a reliable and convenient choice for maintaining your home's temperature.