Multi-functional air quality monitor Temtop M2000C allows you to detect the PM2.5 + PM10 + Particles + CO₂ + Temperature + Humidity. Powered by internal 2200 mAh rechargeable lithium batteries. The M2000C makes it very simple to measure the CO2 carbon dioxide concentration, it is also a great tester of temperature and humidity, easy readings, and portable device. The M2000 is suitable to measure the pollutant of any location in your home, also the workplace, schools, etc...