If these headphones fills wonderfully promise with a battery that lasts, superb comfort accompanied by its majestic (when being still quite disappointed with this low enough). I was waiting for me a long time to be able to take it and I do not separate myself! The spare cable and all located on either side button and the other on the helmet used are very useful! Prices are still high will hesitate me well (with the possible risk of breakage ....). otherwise I recommend it highly! Thank you to the developer of the bluetooth headset levels because for me there is no better either! : -1