Description We all know that air is an indispensable part of our lives. The quality of air is affecting our body and mind, but the air is colorle and tastele,we cant measure it with the eyes. At this time, we need an air tester to help monitor the air quality. Features: Large screen display makes it easier to read data, and the buttons are easy to operate. Easy to carry, suitable for home, automobile, office, factory and other environments. Detectable substance: CO, CO2, HCHO, TVOC, AQI. 24 hours real-time monitoring to protect the healthy life of you and your family. With battery power display, more convenient to use. Specifications: Material: ABS Color: white Detectable substance: CO, CO2, HCHO, TVOC, AQI Application technology: natural air flow detection technology Display mode: LED digital display Error float: 3%-30% Power on preheating: 120 seconds Working voltage: 5V Battery: 1 * lithium battery, 1000mAh (included) Charging time: about 4 hours Standby time: about 180-240 minutes Item size: 125 * 80 * 35mm / 4.9 * 3.1 * 1.4in Item weight: 172g / 6.1ounce Package size: 168 * 108 * 40mm / 6.6 * 4.3 * 1.6in Package weight: 310g / 10.9ounce Packing List: 1 * Air Quality Detector 1 * USB Cable 1 * User Manual Shipping: 1.We guarantee to ship goods out within 24-72 hour after