Comes with 3 sizes for a near-custom fit. Works with iPhone 3/4 and ear-canal style earphones. Comfortably locks earbuds in place during general activity or vigorous exercise.

Yinyoo KZ ZST Colorful Hybrid Banlance Armature with Dynamic In-ear Earphone Earphones 1BA+1DD Hifi Sport Headset, use the patent technology silicon tips. The standard of independent patent technology silicon tips,from the independent patent design of silicone earmuffs ,compared with conventional earmuffs can more comfortable fit human ear ,to sound more direct transmission of the eardrum ,and get better quality experience. Improve noise canceling performance. ¡¾HIGH PERFORMANCE¡¿ Yinyoo KZ ZST Earphone Earphones with enhance the sound quality and exterior again the hybrid technology ,special armature and dynamic driver ,friendly design and free removable cable deign ,high performance for audio earphones around 20usd. perfect for home,parties,school,Christmas gift,Thanksgiving day,Halloween,Black Friday ¡¾STYLISH DESIGN&REMOVABLE CABLE¡¿KZ ZST cable use 3.5MM L plug ,With the stylish design and high-end sound quality ,this earphones are designed for the latest generations of iPod, iPhone, and iPad. They work with all Androids, tablets, mp3 players, and related devices with a standard 3.5 mm jack .also Yinyoo audio offer upgrade cable for KZ ZST ,improve more sound quality ,zst silver plate cable search B01M4NM8MF,zst gold plate cable search B072FN5RSH.