Details
FiiO FH5s Headphone Wired Earphones 2BA+2DD High Resolution in-Ear Earbuds Strong Bass for PC/Smartphones/Players/Laptop Comes with2.5mm/3.5mm/4.4mm Swappable Plug(Black)

【All-new acoustic design】12mm beryllium-plated diaphragm + PU gasket dynamic low frequency driver, this driver is capable of some seriously deep and potent yet controlled bass.
【6mm beryllium-plated dynamic mid frequency driver】 Greatly-improved sensitivity, smoother coherency and less distortion --Time-tested Knowles TWFK-30017 high frequency balanced armature Lush, clean and pleasant vocals and exquisite treble
【Semi-open design at the rear cavity】 Quickly relieve air pressures on the ear – leading to more comfortable and long listening sessions
【3 sound adjustment switches, 8 possible sounds】The FH5s’s use of electronic crossover technology allows you to tune the sound to exactly the way you want with 3 sound adjustment switches. The impedance, bass, mids and treble adjustment depends on what music you are listening or what your preferences are!
【Twist-lock swappable plug】The twist-lock swappable plug allows you to switch between 2.5mm/3.5mm/4.4mm heads to cover a wide range of scenarios.