Developed through collaboration with Jerry Harvey Audio, the black Astell&Kern Roxanne II In-Ear Monitor Headphones allow you to hear the music how the recording artist and mix engineer intended it to sound, utilizing audio devices such as mobile players, smartphones, tablets, and more. Featuring twelve custom-made dual-low, dual-mid, and quad high-balanced armature drivers per side, the in-ear monitors have a variable-bass output, which is adjustable from the cable, and delivers frequency ranges from flat bass response up to 13 dB (10 to 100 Hz). Some additional features are an integrated 4th-order crossover, triple bore with stainless-steel tubing, noise isolation of -26 dB, and the included Moon Audio IEM cables; one 3.5mm unbalanced and one 2.5mm balanced connection. Five sets of silicone eartips, a screwdriver, cleaning brush, and a carry case are also included.