1.【WIFI Air Quality Detector & smart weather station】:The 20-in-1 multifunctional air quality monitor & WIFI smart weather station not only checks PM2.5, PM1.0, PM10, CO2( NDIR infrared sensor),CO( electrochemical sensor), HCHO (formaldehyde), TVOC (volatile organic compound sum), but also displays time, date,alarm clock,5 sensors temperature and humidity data and sets alarms. The 2.8-inch color TFT screen provides clear and easy-to-read data, WIFI Phone app allowing you to view real-time and historical data with ease. APP Store and view 1-year historical data. 2.【 with multiple sensors 】Can take up to 5 wireless temperature and humidity sensors, The five sub- sensors can be placed in five different areas to detect thermometer respectively and transmit data to the host and mobile phone APP，the sensor use 2 AAA battery.( not included ). 3.【 APP Store and view 1-year historical data 】 The smart Phone APP to view the day, month, year and other historical data, The smart APP adjust the display brightness, Celsius & Fahrenheit switch, giving you even more control. the Smart App Connectivity, mobile remote real-time monitoring data, The host monitor automatically syncs with your smartphone's time and date each time you connect, ensuring accurate and up-to-date information. 4.【 Two display modes 】 The host uses a 2.8-inch TFT display, and the sensor uses a 2-inch LCD display , The 2.8-inch color TFT screen provides clear and easy-to-read data, allowing you to view real-time data with ease. After the device is powered on, 7 air quality parameters will be displayed. After 5 seconds, the time and 5 temperature and humidity parameters will be displayed. After 5 seconds, the two display screens switch to each other.Press the key three times consecutively to fix the current display interface, and then press the key three times consecutively to exit the current display interface. 5.【Portable and Rechargeable】 With a compact and lightweight design, the smart Air Quality Detector & smart weather station is suitable for a variety of environments, including homes, public places, nursing rooms, restaurants, hotels, and more. rechargeable battery supports USB charging so you can use it anywhere, anytime. 6.【 Sensor Multiple Mounting Options and Widely Use 】 : Room thermometer for home are available in various installation options: stand, wall mount, and paste mount. Using double-sided tape and suspension holes, you can paste or place room thermometer for home anywhere you like, such as refrigerator, counter, living room, baby room, kitchen, basement, office, greenhouse, guitar room, office, garden, and cellar. Sensor with lanyard and velcro . Host size: 89*83*36mm; Sensor size: 59*59*19mm; Host net weight: 165g; Sensor net weight: 40g; Packing size: 19.5cm*16cm*7.2cm; Packing weight: 500g (with 5 Sensors) ; CO2(carbon dioxide, high-precision NDIR infrared sensor),CO(carbon monoxide, high-precision electrochemical sensor), HCHO (formaldehyde), TVOC (volatile organic compound sum), PM2.5, PM1.0, PM10, 5 wireless temperature and humidity detection, time, date, alarm clock, Smart WIFI APP can remotely monitor data in real time, with up to 5 wireless temperature and humidity sensors, Smart APP can view historical data such as day, month, year, etc. Smart APP can adjust display brightness, switch degrees Celsius & Fahrenheit, 20 in 1 function. 2.8 "TFT display. When the Smart APP is successfully linked, the time and calendar parameters will be synchronized with the data on the mobile APP without additional Settings. This time is 12 hours. Product packing list: 1. One Host ; 2. 5 Sensors;, 3. 1 meters USB TYPE-C charging cable; 4. Sensor lanyard and Velcro; 5. One manual.