How do I know if my AirPods are real?

I bought airpods at a small discount not from apple and i would like to know if it is real or not. I know that fake ones now have serial numbers but mines has the serial number and when i checked on apple.com it asked me to put in the date of purchase and then it showed my warranty for a year after the date or purchase. I doubt fake ones could do this as the serial number used multiple times would be already be activated and could not have full warranty ?

Also mine has the precision finding , seamless switch between macbook and iphone , transparency and noise cancellations are all very nice.All the other minor details are the compared to real airpods , the box, packaging, and texture etc.

[Re-Titled by Moderator]