Pack of 4 Smart Radiator Thermostat - WiFi Smart Radiator Valve For Digital Multi-Room Control Features: Remote Control - Control all your radiators in your home from your phone. No more guessing if you left the heater on in an empty room Voice Control - Ask Alexa or Google Assistant to fine-tune your home’s temperature Smart Schedule - Set heating schedules based on your daily routines to make heating more efficient Frost Protection - Keep your pipes unfrozen and your house safe Child Lock - Prevent children from managing your radiator accidentally. Install It Yourself - Simply replace your old radiator valve with ENER-J and follow the step-by-step in-app guide for installation Specifications: Dimensions: H:118.0 x W:99.1 x D:81.9 cm Weight: 420.0 kg Colour: White Guarantee:2 Years Model Number: SHA5348-4