Audio-Technica ATH-CKR7TW Wireless Headphones - BlackExceptionally pure audio in a True Wireless design. Featuring specially designed 11 mm drivers with diamond like carbon coated diaphragms and pure iron yokes to provide extremely accurate, high fidelity audio. The headphones' housings contain dual layer isolation structures that keep the electric circuitry separate from the acoustic space for optimal phase and transient response. Brass stabilizers reduce resonance and ensure linear diaphragm movement.