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Signal to Noise Ratio: > 78dB SPL Sensitivity: -34dB+2dB(0dBV/pa.1kHz) Frequency Response: 65Hz-18kHz Net product weight: 1.5 meters: about 15.3 grams. 3 meters: about 23.5 grams Product interface: 3.5mm interface, 3 kinds of connectors.