This product is a radiator thermostat, suitable for home heating equipment. Convenient installation and simple operation. The temperature can be controlled through the mobilephone app, so that you can enjoy the appropriate temperature as soon as you get home. Features: LED dot matrix display, new TRV controller. Rotatable screen that allows you to read it from different angles, providing with much more comfortable user experience. Wireless controlling your house radiator no matter where you are via mobilephones. Programmable schedule with weekly programming selection: Supports manual set weekly schedule with 4 periods for each day, providing you with the maximum convenience for different situation and setting customized schedule for your house temperature. Auto mode, manual mode and ON/OFF mode are optional for added convenience. Energy saving in a real sense with temperature ceiling and lower limit setting functional in APP. Compatible with Alexa Amazon and Google Home: Using simple voice command for house temperature control for more convenient experience by adding this radiator controller into Alexa or Google Home. Window check and temperature calibration are supported in APP. Data Logging and Child Lock Function: The Tuya Smart APP will record the temperature statistics with current and set temperature, as well as valves opening degree, allowing you to understand the working status of the product more intuitively; designed with child lock feature to prevents misoperations by your kids, each temperature controller packed with 6 different adapters to meet different matching demand. Low power consumption and longer service time. Specifications: Quantity: 1pcs, 2pcs, 3pcs, 4pcs, 5pcs (optional) Type: WiFi Accuracy: 0.5°C Set Temp. Range: 5-35°C Storage Temp.: -5-45°C Surface Temperature: 90 Max (at the radiator) Connection: m30 * 1.5mm Linear Travel: 4.3mm Waterproof: IP20 Battery: 3 * AA battery (not included) App: Tuya Smart/Smart Life APP Voice control: Amazon Alexa/Google Assistant Item Size: 97 * 58.4 * 58.4mm / 3.8 * 2.3 * 2.3in Item Weight: 118g / 4.2ounce Package Size: 1pcs: 137 * 74 * 63mm / 5.4 * 2.9 * 2.5in 2pcs: 137 * 126 * 74mm / 5.4 * 5.0 * 2.9in 3pcs: 189 * 137 * 74mm / 7.4 * 5.4 * 2.9in 4pcs: 148 * 137 * 126mm / 5.8 * 5.4 * 5.0in 5pcs: 211 * 137 * 126mm / 8.3 * 5.4 * 5.0in Package Weight: 1pcs: 196g / 6.9ounce 2pcs: 392g / 13.8ounce 3pcs: 588g / 1.3lb 4pcs: 784g / 1.7lb 5pcs: 980g / 2.2lb Note: The WiFi model does not need a gateway. Packing List: 1pcs: 1 * Temperature Controller 1 * User Manual 6 * Adapters 2pcs: 2 * Temperature Controller 2 * User Manual 12 * Adapters 3pcs: 3 * Temperature Controller 3 * User Manual 18 * Adapters 4pcs: 4 * Temperature Controller 4 * User Manual 24 * Adapters 5pcs: 5 * Temperature Controller 5 * User Manual 30 * Adapters