100% brand new and high quality 2COWT Multifunctional 6 in 1 CO2 Meter LCD Digital Temperature and Humidity Sensor Tester CO2 TVOC HCHO PM2.5 Detector Air Quality Analyzer Monitor Features. Small size, light weight and easy to carry. Using the highest precision TVOC sensor, real-time detection, data automatically refreshed, multi-purpose. Large LCD screen for clear view of power, PM2.5, CO2 value, TVOC value, HCHO value, temperature and humidity. Switchable between Celsius and Fahrenheit degrees, stable detection performance, strong anti-interference ability, low power consumption and long service life. Equipped with air quality classification function, four different colours correspond to different air quality levels, giving you a more accurate and visual picture of the current air conditions. The casing has hundreds of ventilation holes, which not only accelerates the convection between the air and the machine for effective detection, but also provides good heat dissipation. Widely used in: agricultural farming, greenhouse vegetables, production warehouses, material processing, home interior, business offices, etc. Specification. Material: ABS Battery: 1 X internal lithium battery, 3.7V, 1200mAh (included) Carbon dioxide measurement range: 400ppm-6000ppm Size: 89x70x35mm/3.5x2.76x1.38in Colour: White, Black Product includes 1 X Carbon Dioxide Tester Notes. Due to different monitors and lighting effects, the actual colour of the item may differ slightly from the colour shown in the picture. Thank you Due to manual measurement, please allow for a 1-2 cm measurement variation.