They have fantastic balance with highs/lows and solid mid-range sound. so if one battery ear loop dies u got the other one for back up. I love this shoe because it is very slightly too big but it still fits perfect . The order was shipped directly from China. Get a clue! this was great for me since I need to clear 7" items and the middle shelf was advertised as being a bit shy of that. Very comfortable, washes up great and live the adjustable straps. However, the design of these have a major flaw. I am a sucker for films based on famous musical acts and while I am not the biggest fan of Hip-Hop music I truly appreciate the messages that were being sent back in the days of its humble origins. Go to check, both my ear buds were out of the case.