Features 1、3 in 1: The carbon dioxide detector integrates carbon dioxide detection, temperature detection and humidity detection, so that you can intuitively understand the air quality of the living space. 2、TVOC Sensor: This carbon dioxide monitor uses TVOC sensor to monitor carbon dioxide, with high accuracy, stable performance, strong anti interference ability, low consumption and long service life. 3、Large Screen: The air quality monitor is equipped with a large screen, and different font colors display different air quality, so that 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, so as to achieve effective detection, but also provide good heat dissipation effect. 5、Applicable Scenes: The USB charging carbon dioxide monitor is applicable to a wide range of places, such as schools, hospitals, restaurants, shopping malls, offices, homes, etc. Specification Item Type: Carbon dioxide detector Material: ABS, electronic components Weight: Approx. 213g/7.5oz Product Size: 9x7x3.5cm/3.5x2.8x1.4in Carbon Dioxide Detection Range: 400-6000ppm ± 50 ± 5% ppm, accuracy: 1ppm 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) Package List 1 x Carbon Dioxide Detector 1 x Data Line 1 x Instructions