Multifunctional 5 in 1 LCD Digital Display Portable Semiconductor Sensor CO2 Meter Temperature Humidity TVOC Formaldehyde Tester Air Quality Monitor Analyzer Carbon Dioxide Gas Detector Feature: Carbon dioxide detector: It uses an air semiconductor TVOC sensor to monitor the temperature and humidity of the air quality, and the content of carbon dioxide, formaldehyde and volatile substances in the air. It is a high-quality air quality detector, using a good-quality electrochemical detection module, with good accuracy, stable performance, strong anti-interference ability, and low consumption. Long lasting. Accurately detect carbon dioxide. The large screen displays power, CO2, temperature and humidity, formaldehyde and volatile matter content. The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. Different font colors show different air quality. Hundreds of ventilation holes not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a good heat diipation effect. Specification: CO2 measurement range: 400-5000PPM CO2 measurement accuracy: 150PPM Temperature measurement range: 0-50C Temperature measurement accuracy: 1C Humidity measurement range: 0%-99%RH Humidity measurement accuracy: 2%RH HCHO: 0-0.6mg/m TVOC: 0 -2.0mg/m Screen size: 2.8 inches Screen type: TFT-LCD Screen material: Gla Material: ABS Screen resolution: 240*240 Response time: 1s Working voltage: 5V/1A adapter charging (Type-C interface) Maximum power: Charging current 600mA 3.7V lithium battery power supply Battery capacity: 1200mAh Battery type: Lithium battery Charging method: USB Charging time: about 1 hour Size: 90x70x35mm/3.54x2.76x1.38in Color: White, Black C02 indicator: 0-799PPM: Pointing to the green light 800-1199PPM: Pointing to the yellow light 1200-1599PPM: Pointing to the orange light Above 1600PPM: Pointing to the red light Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. 1 X Carbon Dioxide Tester 1 X USB Cable