The Sony Clear Sound MDR-E9LP In-Ear Headphones in Black are a pack of 2 high-quality earbuds suitable for live monitoring. With a 40mm driver size, these headphones provide clear and powerful sound. Featuring Bluetooth wireless technology, replaceable ear tips, noise isolation, and active noise cancellation, these earbuds also have in-line control, built-in microphone, and extra bass for enhanced audio experience. The compact and foldable design, along with a 3.5mm jack connectivity, make them convenient for on-the-go use. Overall, these Sony headphones are a great choice for musicians and music enthusiasts looking for reliable and versatile audio accessories.