BL SOLID BASS Deep Audio Blue Audio-Technica ATH-CKS550X In-Ear Headphones, Wired, Bass, High-Resolution Compatible,

A φ9.8mm SOLID BASS HD driver with excellent transient response reproduces crisp, deep bass. Large-diameter sound conduits improve sound transmission efficiency and support high-resolution audio sources. A compact body that combines high airtightness and comfortable fit. Closed-back design minimizes sound leakage. A pouch for storing the earphones and four sizes of ear tips are included.