In bulk, the model is old, there is no guarantee of perfection, there will be some flaws, so it is sold as second-hand

Sony Active Style SPORT Running EARHOOK HEADPHONES Earphone - BLACK MDR-AS20J

About this item

Loop hangers prevents dropping off the ear

Soft loop hangers for comfortable fitting

Lightweight clip-on style (Vertical in the ear)

3.9ft cord

3.5mm  1.2m