64 Audio Nio, Universal Fit 8 + 1 driver hybrid in-ear monitor with apex tia and LID technology, 1 x tia BA high frequency driver, 1 x BA mid-high frequency driver, 6 x BA midrange drivers, 1 x Dynamic 9 mm bass driver, Perfectly matched, the drivers create a sound signature with deeply extended bass, rich spatiality and velvety highs, LID technology maintains the sound character regardless of the playback device, Modular apex technology reduces the pressure on the eardrum through pneumatic interactive ventilation, Closed construction, Frequency range: 10 - 20.000 Hz, Sensitivity: 105 dB / mW @ 1,000 Hz, Impedance: 16 ohms (+ 1 / -2 10 - 20.000 Hz), Crossover: integrated 4-way passive crossover, Isolation: -20 dB, -15 dB and -10 dB thanks to the included apex modules, Cable: 1.2 m (detachable), Connection: 3.5 mm mini jack, angled, Scope of delivery: leather case, TrueFidelity foam eartips (S, M, L), silicone eartips (S, M, L), m20 apex module, m15 apex module and mX apex module