The Drayton Wiser WV704R0A0902 Smart Radiator Thermostat is a programmable device with a 7-day schedule, powered by AA batteries and made of plastic and thermoplastic materials. It is compatible with universal, central heating radiators, and underfloor heating systems. The thermostat is designed for easy mounting on radiators and features smart home compatibility with devices like Ring, Google Home/Assistant, and Amazon Alexa. With temperature sensor technology and control styles including app control, digital, and voice commands, this thermostat offers advanced features such as a digital display, communication capabilities, and two cool stages. Missing the metal screw bit to clamp it to the radiator but very easy to replace