Design and features:The Aeropex has an integrated microphone, and volume, music player, and call connect/disconnect controls for paired Bluetooth devices. Additional features include two tonal balance settings, and the ability to activate various digital voice assistants (types unspecified) when it is used with Bluetooth devices that have those capabilities. This model is claimed to be water resistant and comes with two USB charging cables, two earplugs, and a storage pouch.
Sound quality: We found the Aeropex delivers sound quality that falls in the Fair range, meaning that it has sonic shortcomings that leave a lot to be desired when listening to music but don't rule it out for dialog and communication. This model has two tone settings; the tone setting that provided the most bass (as in bass drums, bass guitars, stand-up bass, etc.) was used. The overall sound can be summarized as telephone-like. What little bass this model has was very subdued and lacked impact and depth. The midrange (voices, guitars, horns, etc.) was hazy, congested (think sonic traffic jam), somewhat thin and a bit nasal. The treble (cymbals, the upper range of violins, etc.) was fairly extended, but subdued and a bit sizzly (sounds that should have a delicate shimmer have a sound reminiscent of bacon frying). The sound of this model lacks a sense of liveliness and it does a so-so 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) in the midrange; otherwise room ambience recovery is non-existent. The Aeropex has an open sound, but that's because it's actually not covering your ears, not because it recovers the sense treble "air" in recordings. The other tone setting provided even less bass, an even thinner sounding midrange with less room ambience, the treble went from subdued to prominent; while and the midrange became more lively, the overall sound was even more telephone-like.
Comfort: We found that these earphones produce a slightly sense of pressure in front of the ears and fit securely even with vigorous head movement. When they are played at their loudest volume (which is not very loud), a vibration can be felt that might feel like an electric shock (but it's not).