Welcome to our store! 1, 3 in 1: The carbon dioxide detector integrates carbon dioxide detection, temperature detection, and humidity detection, so you can intuitively understand the air quality in the living space. 2, TVOC Sensor: This carbon dioxide monitor uses a TVOC sensor to monitor carbon dioxide, with high accuracy, stable performance, strong anti-interference ability, low consumption, and long life. 3, Large Screen: The air quality monitor is equipped with a large screen, and different font colors show different air quality, so you can check the air quality at any time. 4, Ventilation Hole Design: The left and right ventilation holes not only accelerate the convection between the air and the machine, to achieve effective detection, but also provide a good heat dissipation effect. 5、Applicable Scenes: The USB charging carbon dioxide monitor can be used in a large number of places, such as schools, hospitals, restaurants, shopping malls, offices, homes, etc. Item Type: Carbon Dioxide Detector Material: ABS, electronic components Weight: Approx. 213 g/7.5 oz Product Size: 9x7x3.5cm/3.5x2.8x1.4in Carbon Dioxide Detection Range: 400-6000 ppm ± 50 ± 5% ppm, Accuracy: 1 ppm Temperature Measurement Range: - 10 ℃ - 50 ℃, Accuracy: ± 2℃ Humidity Measurement Range: 0%-99% RH, Accuracy: ± 3% RH Battery: Built-in rechargeable lithium battery model 18650 1500mAh capacity (shipped with built-in battery) 1 x Carbon Dioxide Detector 1 x Data Line 1 x Instructions Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.