The EPH CP4 OpenTherm Programmable RF RoomThermostat offers simple, wireless heating control for combi boiler systems. Featuring a user-friendly digital interface and 7-day programmable scheduling, it helps improve energy efficiency and comfort at home. The thermostat communicates via radio frequency with the included receiver, making installation straightforward with no hard wiring between the units. Ideal for modern heating setups seeking reliability, convenience, and flexibility.