dear god where do I get into this. The authors in this book do a high-level overview of what tinnitus is, what the causes are, and then go into cognitive-behavioral therapy (CBT) techniques on how you can learn to live with the condition and manage your response to it. Without leaving residue. Maybe its because of the high, almost pure, copper content of the leads, but as they invariably fail in the same place, just on entering the shank of the plugs, I consider this to be a design weakness, which could, and should , be corrected. Buy the real thing and don?t waste money on these cheaper versions. I tried looking up videos and have yet to install it. Overall this was a very fun and easy experience at an affordable cost. He originally ordered a 12, but returned and got the 13. I connected the Amazon Dot to it easily enough over Bluetooth. Great workout shoe and comfortable enough for wearing around the house all day.