Advanced Sensor: Professional convection technology is more sensitive, accurate and reliable. Adopt high precision 12-bit AD smart chip, digital detection signal amplification hardware, software algorithm anti-interference, more accurate. Portable Air Detector: Compact indoor air quality detector, you can take it anywhere and leave device on for continuous monitoring. Easy Operation: Simple operat panle with only two buttons, with Large LCD screen, press one button to find all functions. Healthy Home: This air quality tester detects organic compounds like formaldehyde which has suspected links to nasal and lung emitted from many household materials. By measuring particulate pollution, an air pollution monitor can also help you know when asthma may worsen and when to change your home's air filter. Scope of Application: This easy-to-carry air quality detector can help monitor air quality , kitchen, bedroom, office, school, car, hotel, travel, camping, etc. especially in which has baby,child and pregnant woman. Function: HCHO, TVOC Test range: 0.000-6.000mg/m3 Measurement accuracy: 0.001 Display mode: LED Power supply: 2x AAA battery (not included) Use environment: Relative humidity: 20%-85% Detecting temperature: 5 Celsius-45 Celsius Sampling time: 5-7s Colour: gray Material: ABS Package Contents: 1 * Air Quality Detector 1 * User Manual Only the above package content, other products are not included. Note: Light 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.