This app simply receives data broadcast-ed from aptBeacon sensor devices. Open this App on your device with 2.4G RF supported and enabled, then scan the QR-code of the sensor device, then power on the "Wireless Carbon Dioxide(CO2) Detector"; in this App, it will display the concentration of CO2 around the detector. When the average value in 15 minutes is higher than the pre-defined level, this app will play alarm sound to notify user. For the CO2 detector, the alarm level is 5,000ppm. Wireless Carbon Dioxide(CO2) Detector Features • Compact Size • Detects Carbon Dioxide concentration • High accuracy NDIR sensor • Auto calibration • Low power 2.4GHz RF Applications • Indoor Air Quality monitoring Description This device measures the carbon dioxide concentration near the installation location, and then broadcasts the measurement results via low power wireless signals; users do not need to walk to the detector to read measurement results. This device uses a high-accuracy carbon dioxide sensor module and a low-power 2.4GHz RF wireless communication module. Users only need to install an App in their own mobile devices, turn on the communication function; when stay within the coverage of the wireless signals, the App can display the carbon dioxide concentrations received from the device; besides, if the concentration exceeds the value the user set in their own App, the App will automatically send alarm or notification. This device can be installed in shopping malls, factories, hospitals , warehouses , or underground parking spaces to detect air quality in order to protect the safety of the installation environment.