The digital display on your Classic Pro air purifier provides important information through buttons and indicators:

Buttons:
On/Standby: Power on/off the air purifier.
Night Mode: Sets the air purifier to the lowest speed setting with dimmed lights for nighttime use.
Auto Mode: Automatically adjusts fan speed based on indoor PM levels (PM and tVOC levels for CP9i models) for optimal air quality.
Fan Speed (1-2-3-4): Manually adjust fan speed levels.
Toggle Data Display: Switch between displaying different air quality data. The CP7i toggles between PM1, PM2.5, and PM10 levels. The CP9i toggles between PM1, PM2.5, PM10, and tVOC levels.

Air Quality Display: Shows PM 1, 2.5, or 10 values for CP7i models and PM1, 2.5, 10 or tVOC values for CP9i models.
Wi-Fi: Indicates Wi-Fi connectivity status.
PhotonPure™: Enable PhotonPure™ technology to deactivate 99% of viruses, bacteria, and germs.
Filter Replacement: Indicates when it's time to replace the filter.
Child Lock: Activates child lock feature for safety.
