The Hive Smart TRV Head and Body is designed to allow both manual and App control of your heating. The Hive Radiator Valves Lets You Manage Your Heating Room By Room All From Your Smart Phone, So You Never Have To Heat An Empty Room. For Example, Set A Schedule To Keep Your Bedroom Cool During The Day And Then Warm Up Before You Head To Bed. Hive Hub Required. If you already have thermostatic radiator valves, it’s quick and easy to install Hive Radiator Valves yourself. Simply unscrew the existing head and replace it with a Hive Radiator Valve. The Hive app uses helpful images to guide you through removing your old controls, selecting the correct adaptor for your radiator and getting your Hive Radiator Valve correctly installed. Once installed, the Hive Radiator Valve takes a little time to learn about your radiator while it calibrates, then it will be good to go. Set the exact temperature you want in degrees, rather than just selecting a setting between 1-5., Weight: 0.9259415004 pounds, Manufacturer: Hive