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mobile handsfree earphone

Mobile Handsfree Earphone
Specifications: 1) Driver unit: ?15mm Mylar speaker 2) Frequency response: 20Hz - 20kHz 3) Impedance: 32 ohms ± 10% 4) Sensitivity: 108±3db S.P.L(at 1KHz) 5) Microphone sensitivity:-58 ±3dB ...
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