The ESI ESRTP4 Touch is a wireless, programmable room thermostat that provides user-friendly, touch-button control over heating and hot water systems. It is \""Smart Ready,\"" meaning it can be upgraded for Wi-Fi control via the optional ESI WiFi Hub (sold separately) to allow remote access via the ESi Centro App and voice assistants like Amazon Alexa.\nKey Features and Specifications\n\n--User Interface: Features a large, backlit LCD display and simple touch buttons, making it easy to read and program for all users, including the visually impaired.\n--Energy Efficiency: Includes OpenTherm communication functionality, which enables the boiler to modulate its flow temperature based on demand. This can lead to gas savings of up to 15% when connected to a compatible OpenTherm boiler.\n--Programming: Offers flexible scheduling options including 7-day, 5/2-day, or 24-hour programming, with a choice of 4 or 6 time and temperature events per day.\n--System Compatibility: Suitable for use withy