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.