Features: The compact body design, simple and fashionable appearance, you can put into your pocket and use wherever you want. 1.9inch clear definition color display, 240x280 resolution, the HCHO, TVOC, CO2, temperature and humidity are more intuitive and convenient to read. Equipped with high-precise semiconductor sensors, accurately identify and capture different pollutants in the gases, real-time HCHO, TVOC, CO2 gases concentration is more accurate. Adopts superior temperature and humidity sensors, with fine interference resistance ability, to ensures the accuracy of each indicator measurement, with stable working performance, and low power consumption. Built in high-sensitive intelligent chip for quickly air quality detection to more accurate instrument detection. Specifications: Name: Air Quality Detector Battery: 1 x 700mAh built-in battery (included) Display: 1.9inch color display Working voltage: 3.7V time: 35s Data refresh rate: 2s Detection ranges: 0-9.999mg/m Operation humidity: 0-95%RH Working temperature: -10 to 50 Charging mode: Type-C interface Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, , business offices, etc. Equipped with air quality level division function, 4 different colors of font correspond to different air quality levels, allowing you to more accurately and more graphic know the current air conditions. Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, improve the air-flows passing rate to realize effective detection, but also provide greater heat dissipation effect. Material: plastic colour: black Package Contents: 1 x Air 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.