It is an easy-to-use, safe and reliable dual relay output temperature controller/Thermostat. It can be used as over temperature protection and automatic temperature control system for various electric appliances such as equipment for home-brew, pet breeding, incubation, seedling heat mats, terrestrial heat control, constant temperature cycle of heating pump, culture fermentation, accelerating germination, electric radiator, electric oven, etc. Main Feature: 1. Dual relay output sockets: Be able to connect with refrigeration and heating equipment at the same time.2. Digital Display: Display the current temperature and the set highest and lowest temperature.3. Temperature Unit: Supports Centigrade or Fahrenheit.4. High and low temperature alarms are available.5. Smart life or Tuya Smart App remote control and monitoring.6. Can make setting with the button on device, and still keep work without WIFI. Constant temperature control Fish tank: Example: The most suitable temperature environment for ornamental fish is about 19 to 29. Set the highest temperature is 29, the lowest temperature is 19. It will auto-start the heating output socket to increase the temperature when the current temperature is lower than 19. If the temperature is higher then 29, it will auto stop the heating, then switch to auto start cooling output socket to reduce the temperature. Constant temperature control greenhouse Example: The most suitable temperature environment for greenhouse is about 25 to 35. Set the highest temperature is 35, the lowest temperature is 25. It will auto-start the heating output socket to increase the temperature when the current temperature is lower than 25. If the temperature is higher than 35, it will auto stop the heating, then switch to auto start cooling output socket to reduce the temperature. Constant temperature control breeding & incubation. Constant temperature control wine cellar Set upper and lower limit value of temperature alarm For example : Set the temperature range ( 27~33 centigrade degree ) .when the temperature in house is within the temperature range , the detector will work normal . if the temperature is lower than 27 centigrade degree or higher than 33 centigrade degree , the app will push alarm alerts and the Buzzer will sound at the same time. More Application There are two versions for option: EU version. Specification of EU version:Power Voltage: AC 220-250VRated Current: 10A MaxTemperature measurement range: -30~105 C / -22~221WIFI Frequency: 2.4GHz, not support 5GAPP Control: Smart Life or Tuya Smart APP (Android 5.0/IOS 8.0 or above)Temperature Accuracy: 1%, the temperature can be calibrated. Power Button: Power on/off, also a WIFI pairing button.Increase button: increase temperatureDecrease Button: decrease temperature, turn on/off the buzzerSetting Button: can switch Centigrade or Fahrenheit unit Users can set and control the device via the manual buttons on the controller, so the device can also work without WIFI. App WIFI configuration The controllers use Tuya smart App or Smart Life App.1. Install Appa. Download Tuya Smart or Smart Life App from google play for android or App store for IOS phone.b. Install Tuya Smart or Smart Life App.Register a new account by e-mail.2. Login App account3. Add device to App via WIFI configuration