I bought them thinking they were bone conduction, but I was a little disappointed about that. I Have gotten some fantastic deals with my Amazon Collection jewelry. Need to find uses for the extra hooks. As you can see from the pictures pretty disappointed with Amazon as the box was open. There good Nearly two years on and used every day to listen to audiobooks and music on an Amazon Kindle, the jack cable has become very twisted and the insulation started to break up near the headphones, a quick phone call to Sennheiser and found that they are under a two year warranty, Sennheiser customer services arranged for a replacement cable part number 507223 to be sent out FOC, this arrived in two days from the phone call. 4) Not a huge fan of the screws that hold the bike holder arms. thanks for the charger! Los tenis más lindos que he comprado pero los más duros y poco confortables que he tenido también, es un zapato muy pero muy duro, no los recomiendo Held a better connection for me in comparison as well.