You mean the APTX-HD one? I bought one and it had loads of background noise and it sounded awful, the seller (CCA official store) confirmed they are having problems with those and sent me a regular APTX as replacement. MAYBE they fixed, maybe still broken, that said, EVERY SINGLE bluetooth adapter from KZ I own are different from one another. I have them with cable too short, cable too long, controls on the left, controls on the right, etc. I USUALLY recomment the TRN BT03 but they don't have straight pins, neither... But PIZEN make some adapters with a shorter straight connector so they fit well on both A and B, but they are usually more expensive. I guess you should get the regiular KZ APTX one, in the end.