You may be asked for your AirVisual Node/Pro’s serial number either when activating your device or receiving help from AirVisual’s customer service.
The serial number is 7-digits long (mixture of numbers/letters).
It can be found in two places:
1. On a sticker on the back of your Node/Pro.
2. In the About settings. To find it, press the center menu button on your Node/Pro, then go to "About" > "Device info" > Serial Number.