Features: 9 In 1 Quality Detector: This detector can detect the temperature, humidity, PM2.5, PM10, HCHO, TVOC, CO, CO2, for you 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 quality detecor can be held easily, and it also can be placed on your desk for use. Capacity Battery: This quality detector with -in lithium battery supply, the -capacity battery can a long service time and can be recharged in time when the 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. Specifications: Detecting ranges: Temperature: 0-70 Humidity: 0-99 %RH HCHO: 0-9.999 mg/m tVOCE: 0-9.999 mg/m PM2.5: 0-999 /m PM10: 0-999 /m CO: 0-5000 PPM CO2: 0-5000 PPM : 0-999 Working voltage: 5V Battery: 1 * lithium battery, 1200mAh (included) Recharging port: Type-C Material: plastic colour: black Package Contents: 1 x 9 In 1 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.