Manufacturer TRUTHEAR. Headphone jack 3.5 mm Jack. Item model number ZERO:RED. Form factor In Ear. SPECIFICATIONS Driver: 10mm+7.8mm Dynamic Driver Diaphragm: Polyurethane Suspension LCP Liquid Crystal Composite Diaphragm Impedance: 17.5Ω15% @1KHz Sensitivity: 117.5dB/Vrms @1KHz THD: <1%@1khz Frequency Response Range: 20-40.5kHz (IEC61094, Free Field) Effective Frequency Response Range: 20-20kHz (IEC60318-4, -3dB).
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