MAESTRO SMARTplus - Green/Purple Premium earbuds Innovative Dual Chamber Technology delivers remarkably full and textured bass Advanced 10.7 mm drivers reproduce powerful sound and efficient signal transfer. Supreme Comfort for long hours of listening and conversations, Conforms with the natural shape of the ear for extra comfort Built-in Mic for Calls, On-Cable Remote Control, and Flat & Tangle-free Cable Japanese Design and 100% Guaranteed Buyer Satisfaction