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MAX SSPL90: 138 dBSPL HFA-SSPL90: 131 dBSPL MAX GAIN: 75dB HFA-FOG: 64 dB Frequency Range: 200~5090HZ Harmonic distortion: 500Hz:5.0% 800Hz:2.0% 1600Hz:0.5% Eq.Input Noise Level: 26.6dB Battery ...