Logitech Curve 3.5mm Behind-the-Head Stereo Headphones (Graphite) Logitech Curve Headphones for MP3 General Features: Transparent Graphite color Water Resistant Binaural Headphone Technology Behind-the-Neck Headphone Form Factor Dynamic Headphone Technology Stereo Sound Output Mode 1.2-inch Diaphragm Neodymium Magnet Material 3.5 mm interface 3.6-foot cord length Detachable comfort ring can be added for active use