Feature: 1. Multifunctional: This air quality monitor has multiple built in sensors, infrared detection technology, laser detection technology, electrochemical detection technology, real time data refresh one touch calibration function, power button quickly pressed 3 or 6 times to calibrate sensor data. 2. Wide Application: This air quality tester is essential for a home. Helps detect gas and air pollution in homes, kitchens, bedrooms, mother and baby rooms, living rooms, classrooms, offices, schools, cars, hotels, travel, camping, parties and more, always protecting you and your family in healthy air conditions. 3. AQI Detection: The air quality detector visualises the current air quality according to the current air quality conditions. 4. LCD Digital Display: This air quality detector has a compact body with a cut out back for easy portability and airflow. The large colour LCD digital display makes it easy to identify and read. 5. Intelligent Air Semiconductor Sensor: This air quality detector uses an intelligent air semiconductor sensor, which is more sensitive, accurate and stable compared to ordinary sensors. Specification: Item Type: Air Quality Monitor Material: ABS Battery: Lithium battery 2000mAh (included) Use: Widely used in home indoor air quality testing, car air testing, mother and baby room air testing, public places testing Basic parameters: PM2.5: 0-999 ug/m3 PM10: 0-999 ug/m3 HCHO: 0-9.999 mg/m3 Organic Pollutants: 0-9.999 mg/m3 Carbon Monoxide: 0-999 PPM Carbon Dioxide: 400-5000 PPM Air Quality Index AQI: 0-500. Package List: 1 x Air Quality Monitor1 x USB Cable1 x Instruction Manual