Altec Lansing MZX206 Muzx Core Earphones for $12.95. Shipping is $2.99 for a total of $15.94 shipped. Here is a screenshot for your reference. The earphones feature 10mm Neodymium drivers, noise isolation, 20Hz to 20kHz frequency response, and 16 ohms impedance. Most places have the earphones for about $29.