The Dr. Dre Beats Studio Wireless headphones are equipped with a special Adaptive Noise-Cancelling feature that can be used in two ways. You can block outside interference while music plays or shut the world out completely and enjoy some peace and quiet. These white headphones are wireless and operate on Bluetooth, allowing you to pair them with any compatible device from up to 30 feet away. Using the built-in mic, you can answer calls hands free. These Beats by Dr. Dre headphones are foldable to make storing easy. This pair of over-the-ear headphones is equipped with a 12-hour rechargeable battery, allowing you to listen to your tunes for long hours. With the headphones' padded ear cups, comfort is guaranteed. The Dr. Dre headphones have a frequency range of 20 Hz-20 kHz, an impedance level of 35 ohms, and a sensitivity level of 110 dB.