The Sony WH-1000XM4 Black Wireless Bluetooth Over-Ear Noise-Cancelling Headphones are top-of-the-line headphones designed for studio monitoring, DJ, and live monitoring purposes. With a frequency range of 4 Hz to 40000 Hz and active noise cancellation, these headphones provide exceptional sound quality and immersive listening experiences. The stylish black colour, along with Sony's reputation for quality, makes these headphones a popular choice for professionals and music enthusiasts alike. The foldable design, adjustable headband, and built-in microphone further enhance the versatility and convenience of these Bluetooth headphones.