The Vaillant vSMART Room Thermostat Smart Control Pack 0020197226 is a programmable thermostat designed for central heating radiators. This wall-mounted device features a 7-day schedule, digital display, and the ability to switch between heating systems automatically. Made of plastic in a white colour, it is compatible with Vaillant brand products and has universal smart home compatibility. The thermostat uses temperature sensor technology and operates on low voltage with AAA batteries. Perfect for efficient climate control in your home, the Vaillant vSMART thermostat is a reliable choice for heating and air systems.