9 In 1 Air 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 air detecor can be held easily, and it also can be placed on your desk for use. Lar Capacity Battery: This air detector with built-in lithium battery power supply, the lar-capacity battery can provide a long service time and can be rechard 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., Manufacturer: SLZJWLPPA