The Nest 3rd Generation Learning Thermostat in Stainless Steel Pro Edition is a smart thermostat compatible with all boilers and designed for wall-mounting. It features a round shape with a digital display and colour screen, and includes a display, base, heat link, optional trim plate, and wall screws. This thermostat is programmable for 7-day scheduling and can be controlled via the Google Home or Amazon Alexa, as well as through iOS and Android apps. With a voltage of 230V and a steel construction, it comes with a 2-year manufacturer warranty.