Remote switch device status, temperature and temperature difference value real-time synchronous feedback. It can run independently without WIFI, realize the function of single machine control temperature differenceThe meter output can be turned on or off manually remotely or on site (when the set temperature value is not reached). Optional remote high temperature temperature alarm APP push function (need to open the permission on the mobile phone), the alarm value can be setThe status of the temperature probe can be displayed, which is convenient for maintenance (for reference only). APP can display the actual temperature difference, start and stop temperature difference, high temperature zone and low temperature zone temperatureAnti-freeze protection function, when the temperature in the high temperature zone is lower than 3 degrees, the cycle output is automatically turned on. Heat collector high temperature protection, when the temperature in the high temperature zone is higher than 90 degrees, the output will be forced to shut downThe main account can share the device with others, and the device can only be added to one main account. Note that the alarm requires both the device and the mobile phone to be online. Without the network, it is like making a call without a mobile phone signal Configuration process:nstallation preparation:For Android phones, search for "Tuya Smart" in the application market and download and install the APPSearch for "Tuya Smart" in the APP Store on mobile phones and install the APP.After installing the APP, please use your mobile phone or email to register an account.Note that if you are using an Android phone, please use the system default font, otherwise the display will be confusingColour:As shownMaterial:plasticSize:Sensor length: 2mPackage Contents:1 x wifi temperature difference thermostat1 x waterproof sensorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.