The Sony ULT WEAR 900N Wireless Noise Canceling Bluetooth Headphones in Off-White are professional-grade headphones designed for studio monitoring, DJing, and live monitoring. With a large 40mm driver size and a frequency range of 20-20000 Hz, these headphones provide clear and powerful sound reproduction. The adjustable headband and built-in on/off switch offer personalized comfort and convenience. The wireless technology with Bluetooth connectivity allows for hassle-free use, while the noise cancellation feature ensures immersive listening experience. Additionally, the rechargeable battery with a long charging range and built-in microphone make these headphones a versatile and practical choice for music professionals.