Secondly the war piece during calls is a tad bit muffled but once you have it?s secondary ear piece in it?s clearer. Reordered the same but was too large so I checked the size and says X-Large. Only one earphone worked so had to return. But, my carrier cant support it. Then youve got the internal battery life on top of that. There are no screw holes on the back for mounting. and it?s very light. It?s not double sided sticky so it doesn?t keep the CF case from falling off. Both pieces did not fit together well, and both had what appeared to be melting marks on center shelf, and one of pieces had what looked like tape marks (but not removable) on top shelf as shown in attached images. I wore them out to town on the first decently sunny day after they arrived and they were comfy straight away - my feet did get a little tired towards the end but I had been wearing them and walking about for about six hours by then.