The AH-C621R, available in black and white, features an 11.5 mm driver mounted in a housing made of aluminum die-cast and resin. Tuned to a flat EQ curve, it delivers powerful bass and ultimate clarity simultaneously. The AH-C621R comes with a high-quality cable and a three-button remote control including a microphone, allowing you to control your iPhone's music functions such as play/pause, fast forward, rewind, or volume. Additionally, this enables quick answering or ending of phone calls. The AH-C621R can be used with the accompanying Denon Audio App for iOS and Android, which allows you to fine-tune the sound and customize it to your personal preferences.