One touch multi function control, call / answer / hang up / music play / pause / switch. Aluminum alloy CNC high precision cutting process, the perfect display of the integration of the cavity, built-in 9mm speakers, with PET6u copper ring, bring the perfect sound quality. Metal material, solid solid, ergonomic design, lightweight, simple and delicate. Unique nose, streamlined anti pull design, can effectively control the use of headphones in the process of damage. 1.2 meters fashion dynamic jelly line, anti winding stretch more fee