Monitor CO₂ levels effortlessly with our carbon dioxide monitor. High-accuracy infrared sensing ensures stable readings across different concentrations. With long-lasting battery power of 72-120 hours on standby and intuitive operation, it is ideal for outdoor spaces, offices, classrooms, and labs. | Vevor | | Carbon Dioxide Monitor, CO2 Controller with Temperature and Humidity Display, NDIR Sensor Carbon Dioxide Detector | Dark Gray | Best Buy