This multi-functional detector integrates carbon dioxide (CO2) detection, thermometer and hygrometer in one body. High volume CO2 level has passive influence on people’s health and safety, it can instantaneously monitor the CO₂ level in your living space, helping you take timely measures before it affects comfort, health and safety. It is suitable and ideal for homes, office, schools, meeting room, library, workshops, fireplaces space, greenhouse.