1. 4-in-1 Comprehensive Monitoring: The indoor air quality monitor serves as an solution, capable of simultaneously measuring carbon dioxide concentration, volatile organic compounds (TVOCs), temperature, and humidity. This multifunctional device ensures you have all the necessary information to maintain a healthy indoor environment. 2. Colorful Display for Easy Reading: Featuring a vibrant color screen, the air pollution detector displays current CO2 levels, temperature, and humidity data. The color ring changes according to CO2 content, providing a visual cue to quickly assess air quality levels at a glance, ensuring your indoor environment is always safe and comfortable. 3. User-Friendly Operation: With a simple long press of the power button, the portable carbon dioxide detector is easy to turn on and off. It automatically detects carbon dioxide levels after a 120-second countdown preheating time, making it straightforward for anyone to use and ensuring your home's air quality is constantly monitored without hassle. 4. Compact and Portable Design: Designed for versatility, the CO2 meter temperature humidity sensor is compact enough to be placed in the kitchen, living room, bedroom, or carried with you when you're . Its portability ensures you can monitor air quality wherever you are, providing peace of mind whether or traveling. Gas Type: CO2 With LCD Screen Or Not: Yes Built-in lithium battery: 2500mAh/3.7V Charging time: about 2-3 hours Available time: 240-360 minutes Function: carbon dioxide content check, volatile organic compound content check, temperature and humidity detection Note: Due to different production batches, there may be slight differences in products. Colour:Black Material:plastic Package Contents: 1 x Co2 Detector 1 x Charging Cable 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.