Features: 1. Piano style sounds like a Chopin's nocturnes;  2. Gradient-color-change-sliding touch;  3. Weather,humidity,and ultraviolet display;  4. PM 2.5 in APP;  5. 2.5D arc chamfer;  6. Hidden LCD screen;  7. Unique design &enjoyable touch;  8. Ultra-thin embedded panel, perfectly fit all walls;  9. Suitable for European hidden box;     Function: 1. Modbus, WIFI version, etc., to meet all your needs;  2. Temperature control accuracy (±0.5℃);  3. Power-off protection to avoid loss of data settings;  4. Weekly 5+1+1days &6 period programmable settings energy-saving, cost-saving, environment-friendly;  5. Support local grouping/sharing, centralize controlling hundreds of products;  6. Support Tmall, Amazon echo, Google Home;  7. APP (ios/android) automatically obtains the local temperature and humidity,PM2.5 and creates smart scenes;     Parameter: Power Supply: 95~240 V AC, 50~60 Hz;  Current Load: 5 A(water heating/gas boiler);  16 A(electric heating);  Temp. Error :±1℃;  Sensor: NTC3950,10K;  Screen :LCD Negative display;  Timing Error :<1%;  Set Temp. Range :5～45℃;  Power consumption :<1.5;  Working Ambient Temp/Humidity: 0～45℃, 5～95% RH (Non Condensing);  Installation Box :European 60mm Round Box;  Shell Material: PC+ABS(Fireproof);  Buttons: Capactive Touch Buttons;  Protection :Class IP20;  Size: 13.1 x 7.5cm;     Package included: 1 x Thermostat;  1 x Manual;  2 x Screws;  1 x External sensor(only electric heating)