Large and powerful 9-mm neodymium magnet drivers for crystal clear highs and deep, impactful lows. Frequency response: 10 Hz to 24 kHz so you'll hear every detail in your favorite tunes from the crisp strings of classical music to the powerful bass beats of pop and hip hop | Panasonic ErgoFit Earbuds with Microphone & Neodymium Drivers, Red (RP-TCM125) | Quill