This product not only can detect CO2 for you, but also can detect TVOC, HCHO, temperature and humidity, which can give you the data you care about. This product is small in size, so you can take it wherever you want to use it. With intelligent color and voice alarm function, which can tell you the current air quality level. Wide application: you can use this product for home air detection, car air detection, office air detection, etc. With the high-precision chip, which can accurately capture the small current generated during the electrochemical reaction process and accurately calculate the HCHO measurement results. Specifications: Color: black + white Material: ABS Working temperature: 10~50 Alarm: color, voice Battery: 3.7V, 1200mAh (included) Item size: 98*67*32mm/3.9* 2.6*1.3in Item Weight: 141g / 5.0oz Package Size: 150 * 100 * 50mm / 5.9 * 3.9 * 2.0in