3 in 1 Air Quality Monitor portable CO2 Detector Temperature Humidity Sensor Tester Bedroom car Indoor Carbon Dioxide Monitor      Features:    3 IN 1: This air quality monitor allows you to accurately and quickly test indoor carbon dioxide concentration to protect your health. Indoor temperature and humidity can also be monitored in real time. The product is widely used in the crowded occasions, such as cars, baby rooms, offices, greenhouses, farms, etc. It is an indispensable device for home or office.    Accurate and Reliable: PTH series carbon dioxide monitors are equipped with high-performance sensors based on non-dispersive infrared (NDIR) technology, full scale correction for the temperature measurement, high measurement accuracy, fast response, 1 PPM level resolution. This product could detect the CO2 value from 400 ppm to 5000 ppm.    Unique Design: The CO2 detector has two kinds of air quality warnings, three-color LED indicators and comfortable CO2 concentration in facial expressions, making the air quality more intuitive. Supports USB charging and power indicator, can charge 2400mAh lithium battery, standby for 18 hours. The back heat dissipation design can not only ensure that the sensor is in full contact with the air, but also facilitate heat dissipation. Easy to stand on the table with the bracket.    Appearance: Beautiful appearance, simple design and light weight.    What You Get : CO2 detector *1. USB cable(1M) *1. User manual*1.      Specifications:    Product name: CO2 Tester/Carbon Dioxide Monitor    Model: PTH-5    Product color: Dark gray    Testing items: CO2 PPM, Temperature level, Humidity level.    Function:    CO2 range: 400-5,000 PPM (±50 PPM ±5%)    Resolution: 1 PPM    Sampling rate: Data/1 sec    Temperature range: -10°C to 40°C (14°F to 104°F)    Temperature measurement error: ±1°C (±1.8°F)    Humidity: 20%-80%    Humidity measurement error: ±5% RH    Power supply: Built-in 2400mAh lithium battery and USB cable DC 5V/1A    Battery type: Lithium battery(Mode:18650/ Capacity 2400mAh)    Light Indication:    Green: 400-700 PPM, Good level.    Yellow: 700-1500 PPM, Normal level.    Red: Above 1500 PPM, Bad level.    Package:    Product dimension: Approx.83*83*32mm/3.26*3.26*1.25in    Product weight: 143g/5.04oz    Unit package dimension: Approx.100*86*43mm/3.93*3.38*1.69in    Unit package weight: 192g/6.77oz      Notice:    1) This product should not be dipped in water, nor should it be placed in a high temperature environment exceeding 60℃/ 140°F.    2) This product belongs to precision measuring instrument and shall not be dismantled without authorization.    3) It can not be measured in the environment of organic gas with too high concentration for a long time.    4）Built-in lithium battery, when measuring the air quality in the car, please do not put the carbon dioxide detector with lithium battery in the sun.