3.5 inch TFT HD colour display: real-time display for current time, date, CO2, temperature and relative humidity. The screen has a wide viewing angle of up to 160, which is very easy to read. Data logging function: with up to 65,534 groups of maximum storage management memory, convenient for browsing history data stored by the system. Semiconductor sensing detection technology: monitor the air quality in your environment with high accuracy, real-time detection of CO2, temperature and relative humidity. SIMPLE STYLISH APPEARANCE: The air quality monitor is small in size and clear design and fits perfectly with any home with any decorative style. Free standing style, no assembly required. Wide applications: suitable for use in car, bedroom, living room, office, classroom, library, etc. Features: Semiconductor Sensing Detection Technology: monitoring air quality in your environment with high accuracy, real-time detection of CO2, temperature and relative humidity. SIMPLE STYLISH APPEARANCE - The air quality monitor has a small size and clear design and fits perfectly with any home with any decorative style. Free standing style, no assembly required. Wide applications: suitable for use in car, bedroom, living room, office, classroom, library, etc. Specifications: Material: ABS Voltage: 5V 1A Detection technology: semiconductor sensor technology Test function: CO2, temperature and humidity CO2 test range: 400~4000ppm Temperature test range: -9 ~ 55C. Humidity test range: 0 ~ 100% Working condition: -9 ~ 55 C,