-. You can use the following functions with the smartphone app connected to the device.1. Power on/off the instrument2. Check air cleanliness status (numerical value)3. Clean mode adjustment (automatic/manual)4. Check battery charge status and remaining capacity5. Filter management (life and replacement period)-. If the app does not operate normally, please delete the app and reinstall it.-. The SOOPAIR app recommends using Android 8.0 or higher.