NOTE According to your APP, choose to purchase a smart temperature switch sensor, There are Tuya APP and Ewelink APP, DS18B20 sensor can only detect temperature,the WiFi Switch must work under 2.4GHz WiFi environment. Tuya Switch Sensor Ewelink Switch Sensor Overview: This item is a universal switch for your smart home system to remotely and automatically turn on/off any appliances by phone APP. When the temperature of the environment falls within the range, it will automatically turn on or off the connected devices. It also supports timing turning on/off the appliances and supports presetting the range for temperature. You can also monitor the daily power consumption in real time through this switch..Work with the Smart Switch and the waterproof DS18B20 sensor, you can make your home smarter. Features: *App Support: Free iOS and for Android mobile App Tuya Smart / Smart Life / Ewelink. *Sync Status: Real-time device status provided to App. *Real-time monitor: Monitor real-time temperature. Real-time power monitoring. *Remote ON/OFF: Turn electrical devices on/off from anywhere, with high accuracy temperature waterproof DS18B20 sensor. *Share Control: Control your smart home together with your family. *Timing: Supports 8 enabled countdown/single/repeat timing tasks to turn on/off at specified time. *Auto Mode: Set Auto mode to turn on/off at a specified temp. range. *Manual Mode: Set manual mode to turn on/off immediately. *Trigger Smart Scene: The temp. value works as smart scene trigger conditions to trigger on/off other tuya smart devices. *Voice Control: Compatible with "Amazon" Alexa, for Google Home, for Google Nest. *Waterproof temperature sensor with stainless steel temperature probe, high accuracy, wide usage in daily life. Specifications: Input voltage: AC 85-250V Input current: Max 16A Max. Power: 3000W(16A) Wireless Standard: 2.4GHz, 802.11 b/g/n Security Mechanism: WPA-PSK/WPA2-PSK Control mode: Mobile APP Tuya smart / Smart Life/Ewelink Platform: for Android, iOS Gang: 1 Support temperature sensor: DS18B20. Enclosure Material: Fire-retardant ABS V0 Operating Temperature: 0C-40C Smart Switch Size: 94*57*32 (mm) DS18B20 Sensor Specifications: Type: Waterproof temperature sensor Probe: Stainless steel temperature probe Temperature Measuring Range: -55~+125 Operating Voltage: 3.0-5.5V Weight: 26g Length: 1m Package Information: Package Size: Approx. 15*12*4cm / 5.9*4.7*1.6in Package Weight: Approx. 100g / 3.5oz Packing List: Type 1: 1 * Smart Switch 1 * Sensor 1 * English manual Type 2: 1 * Smart Switch 1* Sensor 1 * English manual 1*remote control (without battery) Type 3: 1* Smart Switch 1 * Sensor 1 * English manual Type 4: 1 * Smart Switch 1 * Sensor 1 * English manual 1*remote control (without battery) Type 5: 1*remote control (without CR2032 battery) Timer & Schedule Voice Control Free hands via easy voice control with Alexa and Google Home. Family Sharing Share the control with family member enjoy the convenience and happiness together App Remote Monitoring & Control Real-time monitoring of temperature changes, Remote control heating and cooling. App Remote Control Turn electrical devices on/off from anywhere,can work without TH sensor, Applicable to Multiple Scenarios Waterproof Temperature Sensor Type: Waterproof temperature sensor Probe: Stainless steel temperature probe Temperature Measuring Range:-55C~+125 Operating Voltage: 3.0-5.5V Temperature Control Switch Turn electrical devices on/off from anywhere,can work without TH sensor, APP Tuya intelligent control: APP Ewelink intelligent control: 433MHz Remote Control: Operating voltage: DC12V (27A/12V Without battery) Transmitting frequency: 433MHz Encoding Type: Learning code Transmission distance : 10-100M (Open field)