Needed screws to be horizontal and not vertical. Ladies, this product is PERFECT. Sound quality: with the noise cancelling off these sound like any standard set of headphones, good mid-range, limited bass and limited top end highs, but would compare nicely to any standard headphones provided with a phone such as those provided by Samsung, there is no tinny sound here, it?s quite an even sound set. Denn ab ca. However, these are not for serious, long distance walking for my feet. They are stretchable and comfortable. great clarity, not muffled, not ?tinny?either. Fit is always right Wish I hadnt waited so long to install. It zipped up too easy and didn?t ?tuck? me in.