Polk Audio ULTRA FOCUS 8000 On-Ear Headphones, Black Audiophile Sound-Stunning detail, full fidelity and deep bass to maximize performance Active Noise Canceling-Battery-assisted true active noise canceling eliminates the distractions of the outside world (batteries included) Push-To-Hear Ambient Control-Mutes the audio and amplifies outside sounds so you can hear without removing the headphones Ultra Fidelity Dynamic Balance Transducers- Polk's proprietary driver technology guarantees full frequency response while minimizing distortion 3 Button Remote Control & Microphone-Use your iPhone and iPod on the fly with in-line controls