Enjoy your favourite tunes with the Audio-Technica ATH-M20xBT headphones. Featuring 40mm dynamic drivers with rare earth magnets, these over-ear headphones deliver exceptional sound quality with amazing depth and punchy bass from 5Hz to 32KHz frequency response range. Their 30-hour battery life lets you enjoy your playlist uninterrupted, even while on-the-go. | Audio-Technica ATH-M20xBT Over-Ear Sound Isolating Bluetooth Monitor Headphones - Black