S8606 CO2 detector features a carbon dioxide sensor along with temperature and humidity sensors. This device is designed to measure carbon dioxide levels, temperature, and humidity in the surrounding environment. It is commonly used in agricultural, aquaculture, and industrial applications such as greenhouses, livestock farms, beer and carbonated beverage production, energy-saving and environmental protection product manufacturing, and underground work safety. In everyday environments including kindergartens, schools, offices, shopping malls, supermarkets, train stations, hospitals, and other public spaces, monitoring carbon dioxide levels helps improve air quality, enhance learning and work efficiency, and support prevention of infectious disease transmission and promotion of public health and safety. Features: - Measures CO2 concentration, temperature, and humidity - Temperature unit selectable between °C and °F - Hold function to freeze measurement readings - LCD dual-line display showing CO2 levels, temperature, and humidity simultaneously - Backlight color indicators: green, yellow, and red for different CO2 concentration levels - Auto power-off function Uses 3 x 1.5V AAA batteries (not included) The instrument has a measuring range of 400–5000 ppm. If CO2 concentration exceeds 5000 ppm, the display will show H1 and emit a continuous beep. The device must be turned off and restarted to continue operation. Note: S8601 uses a semiconductor sensor. Product design and appearance may vary slightly due to ongoing updates. Color and styling may differ from images shown. Please consider this before placing an order if specific appearance or color is required. Material: Plastic Color: Black + Red Package Contents: 1 x Detector Note: Light reflection and differences in display screens may cause slight variations in the color appearance of the product. Measurement error tolerance is +/- 1-3 cm.