In-ear headphones. World's First THX® Certified Headphones. Three Drivers - two balanced armatures and a separate dynamic driver deliver an extremely accurate listening experience with unsurpassed dynamic power. Expertly Tuned - by Grammy® Winning Sound Engineer, Luca Bignardi, to deliver a precise representation of your favorite music. Comfortable Ergonomic Design - the oblique angled ear fittings naturally match your ear canals. 6 sets of included ear tip sizes ensure a proper fit for all. Intelligent Control Technology - in-line controls are compatible with Apple® iOS and Android™, allowing you to conveniently control volume, select songs, and take calls. Color: Gold.