DM1308 CO2 Monitor Tester Indoor Air Quality 400-5000ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor Feature: 1. Accurate detection: It can accurately and quickly monitor the indoor CO2 concentration to protect your health. It can also test indoor temperature and humidity in real time. 2. Stable and durable: Built-in rechargeable battery can continuously monitor air quality for a long time. The clear screen display and three-color LED indicator can help you clearly identify the air quality. 3. Wide application: suitable for air quality monitoring in cars, rooms, schools, office buildings, greenhouses, factories, hotels, hospitals, etc., especially in places with infants, young children, the elderly, pregnant women, etc. 4. Portable and light: small size, easy to carry, can be used for a long time Specification: 1. Material: ABS 2. Display mode: LCD screen 3. CO2 detection method: infrared (NDIR) 4. Sampling time: 1.5 seconds 5. Product size: 70x80x35mm2.76x3.15x1.38 inches 6. Detection temperature: -10 to 50 degrees Celsius 7. Relative humidity: 20%-85% 8. Storage temperature: -10 to 60 degrees Celsius 9. CO2 concentration unit: PPM, detection range: 400-5000PPM 10. Power supply: 1600mAh capacity lithium battery 11. 5V DC power charging via USB port 12. Product weight: 150g