The Link2Home Smart Thermostat makes controlling your heating from your smartphone or tablet easy. It has an elegant design, intuitive control, and easy-to-use features and will work with your existing heating system and no matter who supplies your energy. With the Smart Thermostat, you&rsquoll never need to heat an empty home again, saving up to 10-15% a year on heating bills. You can easily keep track of how you&rsquore using your heating through the temperature graphs on the Link2Home app and receive heating alerts when you leave or return home. The wireless thermostat lets you control your heating when you&rsquore at home. The hub plugs into your boiler control, allowing you to control your thermostat remotely and to communicate with the boiler. Specification Range 100m Setting Accuracy 0.5 Setting Range 5-35 Screen 3.8in LCD Requires 4 x AAA Batteries (Not Supplied)