HIGH PRECISE CO2 TESTING - Professional , this digital CO2 meter built in latest high infrared sensor to offer a quick and high Carbon Dioxide (CO2) detection, CO2 measurement range 400-5000PPM in accuracy of (50+5%*reading).3 IN 1 AIR MONITOR - This air monitor not only helps accurately detect the CO2 content also helps detect humidity and temperature at the same time, wide range use in hotel, living room, baby room, office, greenhouse and more occasions. LCD DISPLAY DESIGN - The CO2 meter features colorful LCD display to display the Carbon Dioxide content (PPM), humidity and temperature in real time, while the clear digital display makes it easier and more convenient for people to read.PERFECT GIFT FOR - USB rechargeable, the temperature unit can be switched between Celcius () and Fahrenheit (), portable and easy to carry, the CO2 meter can be placed on the table or installed to a great health assistant.3 in 1 detector: Carbon Dioxide / Temperature / HumidityDetection range: 400-5000ppmAccuracy: 50ppm; 5%Humidity: 0-99%RH in 5%RHBattery: Built-in 1200mAh batterycolor:WhiteMaterial:ABSsize:70 x 84 x 35mmPackage Contents:1 x air monitor1 x usb cableOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.