Features: brand new and high quality It can be widely used in a variety of situations, such as agricultural plants, greenhouse vegetables, production warehouses, material processing, interior (enclosed environment in homes, nursery rooms, rooms, for cars, offices, etc.). You can install this air detector to check the air quality at any for time and protect your family's for health. for Smart carbon dioxide value tester gas analyzer uses air semiconductor TVOC sensor to monitor temperature and humidity of air quality. The carbon dioxide detector detects indoor air stains,chemicals and colorless and odorless carbon dioxide that can harm thehuman body, and real-time update every second. The digital display colors and numbers allow you to check your current air quality level. The electrochemical detection module of good quality has good accuracy, stable performance, strong anti-interference ability, low consumption and long cabinet life. There are 2 colors you can choose, black and white. Uses a NDIR sensor that absorbs infrared energy (wavelength) that is unique to the gas tar get, so it is highly selectable and achieves a high precision CO2 measurement. The CO2 hardness is for always a significant fluctuation in conjunction with human movement. By measuring every second you can get a relatively stable measurement. Specifications: Material: ABS+PVC Size: 90x70x35.5mm/3.5x2.8x1.4in Input: DC5V / 1A Sensor: TVOC sensor Detection range: 0-5000ppm Resolution: 1PPM Display mode: LCD + backlight Battery: 3.7V/1200mAh lithium battery Temperature measurement range: -20°~60±2 Humidity measurement range: 5%~95%±5 Measuring accuracy ±50ppm±5% Package Includes: 1x CO2 Meter 1x User Manual note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.