I treated myself to a Bose A30 at Osh, so my A20 moves to the passenger seat and this Bose X moves on to a new home. This version has a Lemo connector and no battery box. Works great! I recently replaced ear seals and put on a new mic muff. Advertised on Facebook Marketplace currently for $375, but I'll take $300 shipped CONUS here on VAF. Send me a private message or text: 805-801-29SevenOne.