Feature: 1. RECORD DATA: Support 24 hours 7 days CO2 historical data record, slide left and right to view the chart 2. FOR AIR MONITOR: Designed to monitor air in areas such as classrooms and offices, IP40, also suitable for grow rooms 3. ADJUSTABLE BRIGHTNESS: With ambient light detection function, the screen brightness can be adjusted automatically 4. VARIOUS MODES: Touch the button, slide to switch multiple modes, display humidity, temperature and time. You can also choose desktop or wall mount 5. FAST AND SENSITIVE: The carbon dioxide detector has quick response speed and high sensitivity, and adopts high accuracy NDIR carbon dioxide sensor. Built in 24 hour automatic calibration algorithm program, no need to manually calibrate Specification: Item Type: CO2 Monitor LCD Display: Approx. 12 x 7.5cm / 4.7 x 3in LCD Carbon Dioxide Range: 0~9999 Accuracy: ±50ppm ±5%rdg (0~5000) Response Time: 10 Seconds Temperature Range: -10.0~70.0℃ (14~158℉) Resolution: 0.1/℉ Accuracy: ±0.6℃/±0.9℉ (0~50℃/32~122℉) Humidity Range: 0~99.9% Resolution: 0.1% Accuracy: ±2% (10~90%) Atmospheric Pressure Range: 10 - 1100hPa; 1 - 110kPa; 0.29 - 32.48inHg; 0.15 - 16.00PSI Resolution: 1Pa; 0.1kPa; 0.01inHg; 0.01Psi Number of Data Record Groups : 9144 Groups Operating Environment: 0~50℃, 0~95%RH Storage Environment: -20~60℃, 0~99%RH Sensor Life: 15 Years Power Supply: 4 x 1.5v AA batteries (not included) or 1A output 7-15V AC adapter (US Plug) US Plug 100-240v. Package List: 1 x Detector1 x Adapter1 x Data Cable1 x User Manual1 x CD1 x Storage Box