Radius RANS131K / RA-NS131K / RA-NS131K Neckstrap Earbuds Designed for 3G iPod Nano. Superb Bass Response - Black (Designed in Japan) Designed Utilizing The Same Material As IPod Integrates Seamlessly With 3rd Generation Nano Superb Bass Response And Audio Fidelity Hands Free And Clutter Free. No Annoying Wires While Walking in Black