Sent the S/N of the purchased device and Kingwa mentioned its a 3.1

However seller had an image of the box which shows that its a 3.2

Excellent communication. Easy to deal with. Headphones came in good shape and sound awesome. Good HeadFier.

Nigel79's former/Archived Trader Feedback located here: http://www.head-fi.org/forums/f12/nigel79-447781/

I had an extremely pleasant and smooth transaction with this Head-Fi Member. Item Exactly as described, and had no physical or functional defects. :