Description: 5-in-1 smart carbon dioxide value tester: uses air semiconductor sensors to monitor air quality, with stable performance and high accuracy. It can be used to detect carbon dioxide, , TVOC, temperature, and humidity. Liquid crystal display: large screen display power, real-time monitoring, clear and easy to read digital display. Easy to carry: lightweight, easy to carry, simple operation, no need to calibrate after booting, automatic work, automatic detection. Ventilation hole design: Hundreds of ventilation holes on the back of the housing can not only accelerate the convection between the air and the machine, so as to achieve effective detection, but also provide good heat dissipation effects. Wide range of applications: suitable for homes, offices, cars, schools, hotels and other occasions. Specification: Material: Plastic Carbon dioxide detection range: 400-5000 ppm detection range: 0-0.6 mg/m Temperature display: Celsius (switchable Fahrenheit) Battery: 3.7V 2000mah lithium battery Size Chart: 90x70x35mm/3.54x2.76x1.38inch Package Includes: 2x Carbon Dioxide Detector 2x USB Data Cable 2x English User Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping