Sono deluso da DC. I will write back if they do. overall good headset. Nur die Doppelgrößen finde ich für Kinderfüße nicht optimal. I also own the DT-1350. I returned these immediately. It?s easier to walk in these shoes than flat shoes. I had the series two for the past 3 years and it was time to upgrade to series 5, love it! They still include the lovely little card saying to co tact them if you aren?t happy, only now they don?t appear to care much. I mean it works, but it echos really bad even when muted.