JBL informed me that Trusted Tech Canada, the seller, is not an authorised JBL seller and my one-year warranty was void because of this. This set would have otherwise been perfect. great volume Staring Strength is an excellent book for what it purports to be: a guide to "starting" strength training. Should fit most headphones. Once you put them back in your ear it makes a cool little sound, to indicate it is resuming the play back of audio. This is my first Vionic purchase. Battery lifeIts ok. Clearer, more sturdy, less prone to feedback than Share 58s. They feel kind of cheap for 70$ they seem to be working okay for right now.