I got the Airpods Pro back in the mail yesterday. They sent them back with a little 3-fold white paper in the box that looks like the "quick start guide" Apple might put with a new product. I took a photo of the most relevant part of what was said and attached it here.
(BTW: They arrived with the batteries totally dead in both the AirPods themselves and the case, so that alone makes it *very* dubious if they really did the testing they claim to have done here. How did the AirPods go totally dead after they had to charge them up to test their audio functionality, if they just did that and shipped them right back in a matter of days? I'm trying, once again, to let the charging case sit for 24 hours, charging off a Lightning to USB cable attached to my machine, and will see what it does. But so far, looks to me like it's malfunctioning just like it did when the Apple retail store confirmed it had a problem and sent it off for service.)