Enjoy high-quality audio with the Sony MDRRF912RK over-the-ear headphones. These headphones come with an adjustable headband and comfortable ear cups that provide a personalized fit. The headphones use Bluetooth and RF wireless technology for seamless connectivity and have a range of up to 150 feet.The headphones feature a built-in microphone, volume control, rechargeable battery, noise cancellation, noise isolation, built-in on/off switch, stereo, closed back, and wireless charging. They have a sleek black color and an HF band. With these headphones, you can enjoy your favorite music without any distractions.