Bateria de muy buena duraciónLa cancelación de ruido cumple muy bien su funcion pero si se escucha un "QZZZZ" cuando no hay musica reproduciendose, me hubiera gustado un modelo con usb tipo C y lo siento un poco incomodo despues de un par de horas, se siente mucha presión a pesar de estar acomodados con la diadema a tope, otro cambio que seria genial seria que los controles fueran por medio de boton, asi podria tener un apagado automatico de la cancelación de sonido, ya que ( me pasó) accidentalmente Gave this as gift for bridal shower with her favorite wines with personalized labels in cellophane with ribbon in her wedding colors Everyone loved the presentation and she loved it ! They are very fitted to begin with but they stretch out over time. Well, I tried them on, and I just could not believe it. I am a senior lady who needed a nice low heel to wear to an upcoming outdoor wedding in warm, sunny Arizona. Ive had my eye on Birkenstock Londons for a couple years now, but when I saw Amazon carried them with the soft footbed I finally purchased them. Was delivered within the week from amazon and was packaged very neatly and all the items was seperated in different boxes for protection. Ich habe die Halterung etwas umgebaut. Great price, great fit, comfortable! This was the reason for purchase, so it has been a bit disappointing from that point of view.