Description in size, lightweight and portable, easy to take out and carry around with you. Uses high accuracy semiconductor sensors, with stable working performance, can accurately detect carbon dioxide value. Adopts electrochemical detection module with stable detection performance, anti-interference , low consumption and can provides long service time. LCD display with backlight, you can see the electricity , CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. and switchable, real-time detection, automatic refresh data, with multi-use. Adopts air convection and accurate detection technology, which can provides more accurate detection results. The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, also a fine heat dissipation effect. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, , business offices, and etc.. Name: Air Quality Detector Battery: 1 * built-in lithium battery, 3.7V, 1200mAh (included) Display: LCD display with backlight CO2 measuring ranges: 400ppm-5000ppm HCHO measuring ranges: 0-0.6mg/m3 TVOC measuring ranges: 0-2.0mg/m3 Temperature measurement ranges: 0 to 50 Accuracy: 1 Humidity measurement ranges: 0%RH-99%RH Accuracy: 5%RH Working temperature: 0-70 Working humidity: 20%RH-90%RH color:Black Material:ABS size:70 x 90 x 35mm Package Contents: 1 x Air Quality Detector 1 x USB Cable 1 x English manual 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.