Feature: 1. Real Time Monitoring: Real time monitoring and real time display of carbon dioxide concentration per cubic meter. 2. Intelligent Color Screen Display: Equipped with intelligent color screen display, the numbers are clear, easy to identify and read. 3. Alarm Mode: In the alarm mode, the user can be reminded to pay attention to the environment by changing the display color of the air quality detector. 4. BT Function: With BT function, download the APP, you can view the data on the mobile phone APP can read up to 60 days, 1440 groups of data. 5. Multifunctional: It can also detect and display the temperature and humidity of the environment to help users understand the environment. Specification: .Item Type: Air Quality Monitor Material: ABSProduct Size: Approx. 9.5 x 9.5 x 3cm / 3.7 x 3.7 x 1.2in Voltage: 5V BT APP: Support CO2 Detection Range: 400-6000PP, ±50 ±5%PPM CO2 Detection Accuracy: 1PPM TVOC Detection Range: 0-2.0mg/m³ HCHO Detection Range: 0-0.6mg/m³ Temperature Detection Range: -10℃-50℃ Temperature Detection Accuracy: ±2℃ Humidity Detection Range: 0%-99%rh Humidity Detection Accuracy: ±3%rh Battery: Polymer Lithium Battery 1500mah (Included)Weight: Approx. 255g / 9.0oz Package List: 1 x Air Quality Monitor1 x User Manual1 x USB Power Cable