Product Description This 15-in-1 air quality tester integrates multiple test functions for measuring AQI, CO, CO2, PM0.3, PM1.0, PM2.5, PM10, formaldehyde, TVOC, temperature, humidity, as well as time display, alarm, timer and countdown timer functions, providing a complete solution for your air quality needs. Supporting customizes alarm limits, sets sleep modes, and effortlessly explores detailed historical data on air parameters by day, month, or year. Multifunctional design, supports temperature unit switching, versatile timer settings, and alarm function. It provides a comprehensive way to constantly track indoor air quality, empowering you to stay informed about the air conditions in your home from anywhere, at any time. Features: Comprehensive Air Quality Test: This 15-in-1 air quality tester integrates multiple test functions for measuring AQI, CO, CO2, PM0.3, PM1.0, PM2.5, PM10, formaldehyde, TVOC, temperature, humidity, as well as time display, alarm, timer and countdown timer functions, providing a complete solution for your air quality needs. TFT Color Display & APP Control: 2.8-inch TFT color screen, you can see the test data clearly at a glance. With the Tuya APP, enjoy real-time testing and remote management of your home's air quality from anywhere you are. Personalized Settings & Historical Data Checking: Supporting customizes alarm limits, sets sleep modes, and effortlessly explores detailed historical data on air parameters by day, month, or year. The app also boasts a user-friendly interface with options for temperature unit switching and versatile timer settings, ensuring a personalized and convenient experience tailored to your needs. Warning & Visual Alert: After connecting to WiFi, users can set the alarm value according to their needs. Once the measured data exceeds the standard, the device immediately sends out three emergency beeping alarms, and the interface color changes with the air quality (green-nice, orange-warning, red-bad), intuitive warnings to guarantee immediate response. Intelligent Linkage Control: Use high-end infrared and laser sensors to ensure measurement accuracy. It can link with the smartplug to control external devices. For example, you can set the exhaust fan to turn on when the CO2 concentration exceeds 1500ppm and turn off when it drops below 800ppm, saving electricity. Applicable to families, schools, hospitals, children's rooms, hotels, restaurants, cars, and other places. Specifications: Name: Air Quality Tester Material: plastics Model: MT15-B, MT15-W (optional) Battery: 2000mAh polymer lithium battery (included) Working voltage: 3.7V Working current: 260mA CO2 detection ranges: 400-5000PPM, 50 5%PPM CO2 detection sensitivity: 1PPM CO detection ranges: 0-999PPM, 10PPM CO detection sensitivity: 1PPM TVOC detection ranges: 0-9.99mg/m, 0.05mg/m HCHO detection ranges: 0-1.99mg/m, 0.05mg/m PM2.5 detection ranges: 0-999g/m, 10g/m PM2.5 detection sensitivity: 1g/m PM1.0 detection ranges: 0-999g/m, 10g/m PM10 detection ranges: 0-999g/m, 10g/m PM0.3 detection ranges: 0-999g/m, 10g/m Temperature measurement ranges: -10~50C Temperature measurement error: 2 Humidity measurement ranges: 0%-99% RH Humidity measurement error: 5%RH Charging: 5VDC, 1A Type-C interface Item size: 90 * 35 * 70mm / 3.54 * 1.38 * 2.76in Item weight: 165g / 5.82ounce Package size: 141 * 97 * 48mm / 5.55 * 3.82 * 1.89in Package weight: 185g / 6.53ounce Packing List: 1 * Air Quality Tester 1 * Cable 1 * Guideline