A MAC address is a 6 byte code usually written as 12 hexadecimal characters like: DF-79-DD-9C-B6-1D or DF:79:DD:9C:B6:1D. All network devices have a unique MAC address.
On the bottom of the original BB-8 box is a barcode sticker. Directly under the barcode is what looks like a MAC address.
In the BB-8 app, if you go to Settings, Customer Support, it lists the MAC address of the connected BB-8.
Can someone confirm for me that the MAC address of their BB-8 as shown in the app matches what looks like a MAC address on the bottom of the box it came in?