Feature: 1. Can monitor the environment in real time and output data through a certain protocol format 2. Air detection module is easy to use with good stability, which helps a lot in daily life 3. Mainly used in central ventilation system, smart homes/cities, air quality testing equipment in industrial parks, purification systems, etc. 4. Small size for easy installation, high sensitivity but low power consumption, high shock and vibration resistance, quickly response and recovery time 5. Serial output mode, provide real-time detection of the environment, very convenient Specification: Item Type: Air Detection Module Material: Synthesis cardboard Purpose: The VOC module is a low-power air quality sensor that detects VOC, eCO2, and HCHO gases. It can detect the environment in real time, and output data through a certain protocol format, which is easy to use and has good stability. Working Voltage: DC3.3V Working Current: <40mA Working Environment: Working Temperature 0~70℃, Working Humidity: 15%~95%RH Communication Mode: Serial port TTL level output (active reading mode and passive reading mode can be set by instructions) Warm-Up Time: ≤5min Service Life: 3 YearsSize: Approx. 15.20mm / 0.6in 2.54mm / 0.1in 2.36mm / 0.1in 17.80mm / 0.7in 1.5mm / 0.1in Measurement resolution Measuring range Measurement accuracy CO2 1ppm 400~500ppm ±100ppm VOC 1ppb 0~1000ppb ±75ppb CH2O 1ppb 0~400ppb ±30ppb . Package List: 1 x Air Detection Module