SPRINGY SOUND FROM DUAL CHAMBER: Delivers Hi-Fidelity and springy rich sound with neodymium delivers and dual acoustic chamber which focuses the airflow produced by the driver to expand its range output QUICK-CHARGING BATTERY: Mpow A1 features a quick-turnaround that gives you 2 hours of playback from a 5-minute charge (The specific playback time may vary with different charging divices). Please note: Use the 5V adapter to charge the headset MAGNETIC & NON RETRACTABLE DESIGN :Magnetic design gives you a sleek look. Instead of retractable earbuds, you may choose to play in your ears or hanging around your neck with magnetic earbuds for tangle-free and anti-lost purposes, it's easily for your gym workout.