Design and features:The earphones have an integrated microphone and volume, music player, and call connect/disconnect controls for paired Bluetooth devices. Additional features include support for Apple Siri and Google Assistant voice commands when Bluetooth paired to devices that have those capabilities and manufacturer claimed water resistance. The X10 comes with three pairs of ear pieces in various sizes, a USB charging cable, and a charging cradle/recharger battery/carrying case that the manufacturer claims can be used to recharge the earphone batteries up to 4 times between its own charges.
Sound quality: We found the X10 delivers sound quality that falls in the Very Good range - it reproduces music and voice very well although it does have some noticeable sonic quirks. The overall sound can be summarized as a somewhat bassy and a bit grainy. Bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is somewhat prominent and slightly boomy. The midrange (voices, guitars, horns, etc.) is fairly even, but is slightly grainy and a touch hazy. The treble (cymbals, the upper range of violins, etc.) is fairly extended but is slightly prominent, somewhat smeared (sounds that should have a delicate shimmer sound blurred) and the upper treble is somewhat sizzly (sounds that should have a delicate shimmer have a sound reminiscent of bacon frying). This model does a decent job of recovering the room ambience of a recording (the sense of the acoustic space in which the audio program that's being listened to was recorded). The sound also has a good sense of liveliness and is somewhat open--sound-wise it almost seems like you don't have anything plugging up your ears.
Comfort: As typical of in-ear models they produce a sense of pressure in the ear canal opening might be uncomfortable for some. Users with small earbowls might find that the earphone body does not fit securely into their earbowl and that the earphones are mostly held in place by the section of the earphone that is inserted in the ear canal. Users with medium and larger sized earbowls will probably find that this model fits and stays in place with no problems for casual use and that they are very stable even during vigorous head movement.
