KZ ED9 Silver Tuning Nozzles In-Ear Headphones Bass and balanced tuning nozzles, with different musical styles Innovative T-shaped driver unit, make soft feel of sound and better extension of vocals New vibrant PEK diaphragm, has purer vocals, dynamic texured bass Musical instruments level acoustics copper housing 3.5mm gold-planted jack with 90-degree angle, 3.9-foot flat tangle-free cord