Sony MDR-EX51/N Fontopia Series 3.5mm Connector Canal  In-Ear Stereo Portable Audio Headphones (Black Gold) Lightweight in-the-ear headphones designed to minimize ambient noise Extra-small 9 mm drivers produce an impressive 6 Hz to 23 kHz frequency response Soft silicone ear buds reduce fit comfortably in the ear Oxygen-free copper cord and gold-plated mini-plug improve signal transfer Includes 2 pairs of ear buds and carrying case; 90-day warranty