Features: Comprehensive Air Quality Testing: This 15-in-1 air quality tester integrates a variety of test functions to measure AQI, CO, CO2, PM0.3, PM1.0, PM2.5, PM10, HCHO, TVOC, Temperature, Humidity, as well as time display, alarm, timer, and countdown timer functions, providing you with 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 at a glance. Using APP, you can test real-time and remotely manage the air quality in your home anytime, anywhere. Personalized Settings and Historical Data Check: Supports customizing alarm limits, setting sleep modes, and easily exploring detailed historical data about air parameters by day, month or year. The app also features a user-friendly interface with temperature unit switching options and multi-functional timer settings, ensuring a personalized and convenient experience based on your needs. Early Warning & Visual Alert: After connecting to WiFi, users can set the alarm value according to their needs, once the measurement data exceeds the standard, the device immediately sends out three emergency beeping alarms, the interface color changes with the air quality (green-good, orange-warning, red-poor), a visual warning to ensure an immediate response. Smart Linkage Control: It can be linked with smart plug 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 the CO2 concentration drops below 800ppm to save power. Suitable for homes, schools, hospitals, children's rooms, hotels, restaurants, cars and other places. Specifications: Color: Black / White (Optional) Model: ZN-MT29 Material: ABS Battery: 2000mAh polymer lithium battery Working Voltage: 3.7V Working Current: 260mA CO2 Detection Range: 400-5000PPM, 50 5%PPM CO2 Detection Sensitivity: 1PPM CO Detection Range: 0-999PPM, 10PPM CO Detection Sensitivity: 1PPM TVOC Detection Range: 0-9.99mg/m, 0.05mg/m HCHO Detection Range: 0-1.99mg/m, 0.05mg/m PM2.5 Detection Range: 0-999g/m, 10g/m PM2.5 Detection Sensitivity: 1g/m PM1.0 Detection Range: 0-999g/m, 10g/m PM10 Detection Range: 0-999g/m, 10g/m PM0.3 Detection Range: 0-999g/m, 10g/m Temperature Measurement Range: -10~50 Temperature Measurement Error: 2 Humidity Measurement Range: 0%-99% RH Humidity Measurement Error: 5% RH Charging Mode and Interface: DC5V/1A, Type-C interface Item Size: 90 * 70 * 35mm / 3.54 * 2.76 * 1.38in Item Weight: 160g / 5.64oz Package Weight: 185g / 6.53oz Package Size: 14.1 * 9.8 * 4.8cm / 5.55 * 3.86 * 1.89in Package List: 1 * Air Quality Tester 1 * Charging Cable 1 * Packaging Box 1 * User Manual (English)