This is a challenging review to make because these earphones sound great but the overall experience of using them, is average at best. The Yamaha TW-E3A Buds come with some good specifications on paper but the implementation has a significant amount of oversight on some pretty important design traits. Let's start with the good things about this set: - Bluetooth 5.0 -> good for signal maintenance over multiple codecs - SBC, AAC, Qualcomm aptX LL ->The choice of audio transmission codecs really helps with dealing with multiple devices. e.g. The Apple iPhone uses AAC (pretty strong signal, low-ish bitrate), Android devices can use SBC or aptX (defaults to SBC for better signal strength) - The drivers are tuned to be relatively sharp. The audio experience is quite pleasing (not quite Bose/Sennheiser level but it is good) Now, for the not-so-great things about the product: - The case size is not functionally sized. (I'll get back to this) - The contact points in the charging