Brand new boxed vertical tado° Smart Radiator Thermostat Quattro Pack features temperature, humidity, and ambient light sensor technology, along with app control for easy operation. Powered by AA batteries with a voltage of 3V, these thermostats are heat resistant and programmable. They are compatible with Apple HomeKit, Google Home/Assistant, and Amazon Alexa for seamless integration into your smart home setup. The sleek white design adds a modern touch to your home while providing efficient heating control. V3P4SRT01VTCML