Hello Arno, I would never suggest Bluetooth for an audiophile, as there's always some smallamount of sound degradation that mey not be perceivable by folks who aren't audiophiles but which will affect the listening pleasure of audiophiles. I would recommend you stick to cables and the gold plated wired connectors and plugs if you use those. To answer your question though, the Miccus devices use A2DP. Regards, Laz From: "Arno Schuh" <arno.schuh@in-trier.de> To: "Plextalk User Discussion List" <plextalk@lists.hodgsonfamily.org> Subject: Re: [Plextalk] New Portable Water Resistant Wireless         Mini-Speaker!   As low as $24.99 with Coupon Code. Message-ID: <B32931CD7E0E4F12BCE5E57F819EB79A@Orakel> Content-Type: text/plain; format=flowed; charset="iso-8859-1";         reply-type=original Hi, did your devices support APT-X, too? http://en.wikipedia.org/wiki/AptX Just for listening to audio books any Bluetooth standard is good enough, but when transmitting music to even small speakers, and more than this, to my stereo, the sound of Bluetooth often is muffled. Brass is okay but the trible sounds like AM radio. ATP-X to my ears sounds a little bid better than the standard codec. Yours sincerely Arno -- Talking MP3 Players with stereo FM radio, voice recording, and expandible memory! Priced under $100, plus free shipping in the US! Listen to our Introduction to Talking MP3 Players: http://www.blind-geek-zone.net/an-introduction-to-talking-mp3-players/ See our current special: http://www.talkingmp3players.com/specials.html Join our mailing list by sending a blank email with the word subscribe as the subject to: tmp-request@freelists.org Email: laz@talkingmp3players.com Skype: lazmesa Phone: 727 498-0121 Facebook: https://m.facebook.com/Talkingmp3players?_rdr Personal Facebook: https://m.facebook.com/laz.mesa