Available in black and white, the AH-C621R uses an 11.5mm driver mounted in a cast aluminum and resin housing. Set to a flat EQ curve, it delivers powerful bass and ultimate clarity at the same time. The AH-C621R offers a very high quality cable and a three-button remote control including microphone, so you can control the music features of your iPhone such as play/pause, fast forward, rewind or volume. In addition, this enables fast acceptance or termination of telephone calls. The AH-C621R can be used with the included Denon Audio App for iOS and Android, which allows you to adjust the sound to your personal preferences.