The instructions advise you to charge the batteries which are in the headphones for around 7 hours before using them. They’re a great addition to my Birkenstock collection. harman onyx studio 4 I hope this helps. Edit 11/19/20 - Edited for accuracy. harman onyx studio 4 However when they arrived they fit perfectly, a 9 would have been too big. harman onyx studio 4 Or I can go two rows of cells over. I only have two real complaints, though they’re not deal breakers. The quality of these is nothing like I see in my Bose or Beats. harman onyx studio 4 The iPhone app doesn’t still completely tellMe it’s air tight for noice cancellation. true to size fit.
harman onyx studio 4