General description This Total Smart WiFi Air Quality Sensor Guard is a multifunctional device designed to monitor various air quality parameters including CO2, TVOC, HCHO, PM2.5, temperature, and humidity. It features a high-quality electrochemical detection module for accurate readings and stable performance, making it an essential tool for maintaining a healthy indoor environment. Technical specifications Battery: 3.7V lithium battery Working voltage: 5V Charging method: USB 500mA Type-C interface Charging time: approximately 4 hours Standby time: about 300-360 minutes Measurement error: +/- 1-3cm Color: White Material: ABS Usage Real-time air quality monitoring through the Tuya APP, allowing remote management from anywhere. Customizable alarm limits and sleep modes for personalized settings. Access to detailed historical data on air parameters by day, month, or year. Temperature unit switching and versatile timer settings for user convenience.