Feature: 1. PORTABLE AND CONVENIENT: Air quality detector is compact, easy to carry and store, easy to use, good performance and long service life. Digital screen, easy for people to recognize and read. 2. APPLICABLE PLACES: Air quality meter helps to detect gas and air pollution in homes, kitchens, bedrooms, offices, schools, cars, hotels, travels, camping, parties, etc., always protect you and your home in healthy air conditions. 3. MULTIFUNCTIONAL: Air quality tester detects CO2, HCHO, TVOC, temperature and humidity. It detects and displays the temperature and humidity of the environment to help users understand the state of the environment. 4. QUICK AND ACCURATE: Ensures fast response and accurate measurement, providing real time monitoring data that you can rely on for safety or health reasons. 5. LONG LASTING BATTERY: With its built in 1200mAh rechargeable battery, the detector ensures long lasting performance, making it a great tool for continuous monitoring of air quality. Specification: Item Type: Air Quality Detector Product Material: ABS Battery Information: 1200mAh Lithium Battery (Shipped with Built in Battery) Display Mode: Color Screen and Backlight Display HCHO: 0‑9.999mg/m³ TVOC: 0‑9.999mg/m³ CO2: 400‑5000ppm Temperature: 0‑50℃ Humidity: 20‑90%RH. Package List: 1 x Air Quality Detector1 x USB Cable1 x Instruction Manual