Portable carbon dioxide detector adopts air semiconductor sensor with stable performance and high detection accuracy. It supports connection to the mobile APP via BT, you can view the data within 60 days. Large-screen LCD digital display, real-time monitoring, great for home, office, school, warehouse, agricultural planting, etc. Features: Multifunctional air quality detector, real-time monitoring of CO2 concentration, HCHO value, TVOC value, temperature and relative humidity in the air. Using air semiconductor sensor, plus high-performance chip, detection is more accurate, higher precision, and the accuracy can reach 1PPM. Support to connect to the mobile APP via BT, you can read up to 1440 sets of data for 60 days, compatible with iOS and Android systems. With multiple ventilation holes, which accelerate the convection beyween the air and the detector, to achieve effective detection and provide a good heat dissipation effect. Equipped with 1500mAh high-capacity rechargeable battery, environmental protection, long battery life, no need to replace the battery frequently. Lightweight and portable, it is suitable for home, office, school, warehouse, agricultural planting, etc. No need to calibrate at startup, automatic monitoring. Specifications: Model: 5 in 1/ 3 in 1(optional) Color: Black/ White(optional) Detection Range: 400-6000PPM, ±50±10%PPM Detection Accuracy: 1PPM Battery: Built-in 1500mAh Lithium Battery Current: 160mA Power: 0.6W Item Size: 89 * 70 * 35mm/ 3.5 * 2.8 * 1.4in Item Weight: 142g/ 5.0oz Package Size: 141 * 98 * 48mm/ 5.6 * 3.9 * 1.9in Package Weight: 210g/ 7.4oz Packing List: 1 * CO2 Meter 1 * USB Cable 1 * Manual