This carbon dioxide detector can accurately and quickly test indoor carbon dioxide levels to protect your health. At the same time, it provides real-time monitoring of indoor temperature and humidity.Using infrared technology, it has high measurement accuracy, fast response speed, and a resolution of up to 1ppm. It can accurately detect CO2 in the , and the measurement range can reach 400-5000ppm.This indoor carbon dioxide meter has a 4-color LED indicator as an quality warning. Different colored lights will flash according to the CO2 content, making the quality more intuitive.The 1200mAh rechargeable battery provides 240-360 minutes of standby time and can be charged through the Type-C charging port. 2.8-inch LCD screen with backlight display, clear and soft display, clear reading.Portable size, easy to carry around. easy to use. No need to calibrate after on, automatic work, automatic detection. It can be used in offices, , schools, hotels, greenhouse vegetables, production warehouses, raw material processing and other occasions.CO2 Description:0~799ppm: Green light flashes800~1199ppm: yellow light flashing1200~1599ppm: Orange light flashes1600~1999ppm red light flashingAbove 1999ppm, the four-color light flashesDisplay mode: LED digital display + LCD screen + backlightCO2 detection technology: infraredCO2 measurement range: 400-5000PPMCO2 detection sensitivity: 1PPMTemperature measurement range: 0-50CTemperature measurement accuracy: 1CHumidity measurement range: 0%-99%RHHumidity measurement accuracy: 2%RHBattery capacity: 1200mAh lithium batteryCharging port: 5V Type-C portProduct size: 9.0 x 7.0 x 3.5cmDIY Supplies:ELECTRICALWith LCD Screen Or Not:YesGas Type:oxygencolor:WhiteMaterial:ABSPackage Contents:1 x Carbon dioxide detector1 x USB cableOnly 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.