Sennheiser CX380 Sport Series II Noise Isolating Earbuds (Discontinued by Manufacturer) High-performance dynamic driver systems for powerful, bass-driven stereo sound Personalized fit in the ear canals due to ergonomic design and different sizes of ear adapters Cable clip and carrying pouch included for convenient handling and storage Rugged Design Sweat and Water Resistant Optimized for MP3, iPod, iPhone, CD players and portable gaming systems Connectivity technology : Wired