SOL REPUBLIC 1131-36 Relays 3-Button In-Ear Headphones - Horizon Blue 3-button operation, with mic, music and phone control. Connectivity Technology : Wired I5 Sound Engines deliver full sound from a compact design with balance and details that brings out the best in all types of music. With the help of Free Flex technology and a low profile design, RELAYS offer a universal fit that's easy to put in and won't fall out. Lightweight and low profile - fit under a helmet or hat Sweat- and water-resistant, with a slim-fit carrying case, clip on cable