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. 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 ensure more accurate instrument detection. 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. Widely applications: agricultural-planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, etc. Specifications: Material:ABS Size:Approx.8.5x5.06x1.7cm/3.34x2.04x0.66inch Color:White/Black Continuous working time: 3-8(minutes) Working temperature: -20-60() Detection range: 0-1000ug/m3Heating time: 35s Operating voltage: 3.7v Data refresh-rate: 2seconds Working humidity: 0 ~95% rh Charging mode: C-interface Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Air Quality-Detector