I've been using this kit for a few years now and it's been fantastic for controlling the heating and hot water from home or though the app when I'm away. I've removed it because it's not compatible with my new heat pump. The Hive Active Heating Thermostat, Receiver, and Hub is a white, wall-mounted thermostat that operates on battery power (4 x AA size) and offers wireless connectivity. It features smart home compatibility with Hive and Amazon Alexa, allowing for convenient control through the Hive app. With a 7-day programmable schedule and frost protection features, this thermostat provides efficient heating management for any room in the house. Made of plastic in a square shape, this thermostat is a reliable choice for central heating radiators in the UK.