T9 in-ear monitors, Knowles double balanced armature transducers, hand assembled, 3.5 mm stereo mini jack plug compatible with all systems, 120 cm solid and replaceable cable, ideal complement to the U4 system, 3 size tips, case, cleaning tool , 6.35 mm Jack adapter, frequency response: 20-16500 Hz, impedance: 59 ohms, sensitivity: 120 dB, weight with cable: 18.6 g
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