Sony MDR-E827G Sports Series Fontopia Water-Resistant Ear-Bud Stereo Headphones (Discontinued by Manufacturer) Water Resistant Lightweight Sony Acoustic Twin Turbo Circuitry High-Power Neodymium Magnet. Connectivity Technology: Wired Super-light, ear-bud headphones are water resistant Features Sony's acoustic twin turbo circuit for improved efficiency 13.5mm driver units are used for their small size and low weight Directional bass cap for greater bass sound Neodymium magnets provide maximum energy with minimal size