Useful air quality detector with quick response and high precision to test CO2 content in the air that surrounds you, and real-time display time, date, temperature and relative humidity. Features: 3.5-inch TFT HD Color Display: real-time display current time, date, CO2, temperature and relative humidity. The screen has wide viewing angle that can reach 160°, which is very easy to read. Data Logging Function: with up to 65,534 groups maximum storage management space, convenient for browsing the historical data saved by the system. Semiconductor Sensing Detection Technology: monitoring air quality in your surrounding with highly accuracy, real-time detect CO2, temperature and humidity. Simple Stylish Appearance: the air quality monitor has small size and clean design, perfect fit for house with any decorative style. Free-standing style, no mounting required. Wide Applications: suitable for using in the car, bedroom, living room, office, classroom, library, etc. Specifications: Material: ABS Voltage: 5V, 1A Detection Technique: Semiconductor sensing technology Test Function: CO2, temperature & humidity CO2 Test Range: 400~4000ppm Temperature Test Range: -9~55 Humidity Test Range: 0~100% Working Condition: -9~55, <90%RH Automatic Shutdown Time Setting Range: 10~1080 minutes Backlight Brightness Setting Range: 10~100% Date & Time Setting: Users can set the current date and time Historical Data Settings: Users can view historical data saved by the system Maximum Storage Management Space: 65,534pcs Timing Storage Settings: 10~1080 minutes Timing Screen Switching Setting: 10~600 seconds Language Setting: Chinese, English, Korean, Japanese, Russian Battery: 1 * 3.7V 3000mA Li-ion battery (Built-in) Item Size: Approx. 100 * 58 * 78mm / 3.94 * 2.28 * 3.07in Item Weight: 200g / 7.08oz Package Weight: 364g / 12.86oz Package Size: 17.6 * 11.2 * 7cm / 6.93 * 4.41 * 2.76in Packing List: 1 * Air Quality Detector 1 * USB Cable 1 * User Manual (English)