9 In 1 Air Quality Detector: This detector can detect the temperature, humidity, PM2.5, PM10, HCHO, TVOC, CO, CO2, at one time, you can view the data you care about at any time. LCD Color Display with Backlight: The colorful screen allows you to see different values at a glance, and the backlit display makes it easy to see data at night. Portable Size: This air quality detecor can be held easily, and it also can be placed on your desk for use. Large Capacity Battery: This air quality detector with built-in lithium battery power supply, the large-capacity battery can provide a long service time and can be recharged in time when the power runs out. Advanced Detection Technology: The HCHO and CO adopting electrochemical detection technology, TVOC and CO2 adopting semiconductor detection technology, PM2.5 and PM10 using infrared sensors. Detecting ranges: Temperature: 0-70℃ Humidity: 0-99 %RH HCHO: 0-9.999 mg/m³ tVOCE: 0-9.999 mg/m³ PM2.5: 0-999 /m³ PM10: 0-999 /m³ CO: 0-5000 PPM CO2: 0-5000 PPM : 0-999 Working voltage:5V Battery:1 x lithium battery, 1200mAh (included) Recharging port:Type-C Color:Black Material:Metal+Plastic Package Contents: 1 * Air quality detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.