The B400 is a 4 armature powered earphone that is 3D printed and assembled in house by Brainwavz. Specifications: Drivers : Quad Balanced Armature Rated Impedance : 30Ω Frequency Range : 10 Hz - 40 kHz Sensitivity : 115dB Cable : Detachable MMCX Plug : 3.5 mm, Gold plated Included...