Panasonic RP-HJE120 ErgoFit In-Ear Headphones Stereo Earbuds (2-Pack, Blue) Color-matching for iPod Nano 5th Generation Ergo-Fit Design for Ultimate Comfort and Fit,3.5 mm plug 3 Pairs of Soft Earpads Included (S/M/L), 1 Year Limited Warranty, Parts and Labor Drive Unit (diam.in mm) - Diameter 9mm Impedance (ohm/1kHz) - 16