new earphone
style: in ear
provide the excellent bass and let you enjoy the music.
any customized style earphone is OK

new earphone
style: in ear

specification of earphone

Transducer:5U
Impedance:32Ω±15%
Sensitivty:113±5dB at 1KHz,5mW,
Frequency respond:20Hz~20KHz
Rated Input Power:5mW
Maximum Input Power:10mW

any style and shape can be customized. OEM is welcome