PTH-5 Professional Carbon Dioxide Detector Air Quality Tester Monitor Temperature and Humidity Meter High Sensitive CO2 Sensor Tester                  NOTE:The difference between PTH4 and PTH5 is that PTH4 does not have the function of measuring temperature and humidity, and all other properties are the same                  Features:       1.Using non-dispersive infrared technology (NDIR), full-scale temperature range correction; 2.Various air quality warning forms such as indicator lights and facial comfort expressions; 3.The screen backlight will automatically turn off in 10 minutes and wake up with one key; 4.Large-capacity 18650 lithium battery, long battery life; 5.Support USB charging method; 6.There is a bracket stand on the back of this product, which is convenient to place on a flat surface for continuous monitoring                  Specifications:       Model:PTH-5,PTH-4(optional) Material: ABS Colour: Black CO2 detection range: 400-5000ppm Battery: 1 * lithium battery(Built-in) Size: 83*83*32mm                  Package include       1 *Air quality detector 1 * USB cable 1 * User Manual