1) Type: necklace earphone 2) Perform: popular lines, comfortable and elegant; highly accurate sound reproduction,enhanced bass and noise-isolating 3) Shell Material: light metal 4) Driver unit: I|10mm 5) Impedance: 32Ic 6) Sensitivity: 108dB/mW 7) Rated power: 3mW 8) Frequency response: 20-20kHz 9) Inserter: stereo I|3.5mm or 2.5mm 10) Normal Packing: PP bag and PE bag 11) Excellent packaging: gift box
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