Used one- tested works- The Audio-Technica ATH-M30X Over the Ear Headphone in Black is a high-quality headphone designed for studio and live monitoring. With a 40mm driver size, double earpieces, and a comfortable headband form factor, this headphone provides excellent sound quality and noise isolation. Equipped with Bluetooth wireless technology, active noise cancellation, and adjustable headband, the ATH-M30X is a versatile choice for musicians, sound engineers, and audio professionals. Additionally, its foldable design and leather cushions add to its portability and comfort for long listening sessions.