【Monitor Indoor CO2 Levels】Equipped with a Swiss-made Sensirion CO2 sensor that utilizes NDIR technology to provide precise and sensitive measurements. The colored indicator lets users quickly judge the CO2 level. It finds extensive applications across diverse settings, including homes, schools, office buildings, hospitals, restaurants, shopping malls, factories, hotels, laboratories, and more.

【Temp & RH Monitoring】High-accuracy temperature and humidity sensor. Measurement ranges from -20~50°C (-4~122°F) and 0~99.9%RH (non-condensation environment).

【Wi-Fi Connectivity, Enables Remote Monitoring】Remotely access data via the "Qingping IoT" app or website, as the product supports Wi-Fi. Devices can be managed with Qingping IoT, shared and collaborated with teammates. The battery has a long standby time, and you can also plug it in USB power all the time.

【Multiple Alert Methods】The built-in buzzer will alarm if CO2, temperature or humidity is over-limit. You can also get alerts via app notifications, emails, and text messages. * The buzzer alarm feature can be turned off/on using the Qingping IoT app or website.

【View and Export Historical Data】Historical data graphics of recent 24 hours and 30 days are available on Qingping IoT, while the data can be exported as Excel files. No need to worry about network interruption -- the device can save up to 2,880 sets of readings locally, and the data will be uploaded to the server when the connection is back on.