Digital Formaldehyde Detector Hygrothermograph Alarm Clock Carbon Dioxide Tester Air Quality Monitor Gas Analyzer This product can detect air quality in your surrounding with accurate indoor/outdoor air quality monitoring system, quick response and high accurancy. Features: Highly accurate indoor and outdoor air quality monitoring system with professional grade detection technology. Can detect HCHO, TVOC, CO2, PM2.5, PM10, temperature, humidity, and can also set and diaplay time, alarm clock, and calendar. Large LCD display with backlight, convenient for your reading anytime. Real-time local outdoor air quality readings and real time gas monitoring to prevents any respiratory disease. Suitable for using in the car, living room, house with new furniture and decoration, kitchen, bedroom, office, classroom, outdoor environment, etc. Specifications: Material: ABS Color: white Detect error: ＜15％ Test function: HCHO, TVOC, CO2, PM2.5, PM10, Air Quality Monitor, Temperature, Humidity Working voltage: 5V Battery: 3.7V, 1000mAh Standby time: about 240-360 minutes Relative humidity: 20% - 85% Item size: 127 * 85 * 50mm / 4.95 * 3.32 * 1.95in Package size: 135 * 100 * 50mm / 5.27 * 3.9 * 1.95in Package weight: 356g / 12.46ounce Package list: 1 * Air Quality Detector 1 * USB Cable 1 * User Manual