The ATH-CKR7TW in-ear headphones deliver the exceptionally pure audio of Sound Reality in a true wireless design. The headphones feature 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. And stainless steel acoustic mesh resistors provide improved high-frequency response. The result is amazing wide-range audio reproduction with deep, rich bass and crystal-clear high frequencies.