Behind the Ear hearing aid 1.With quite competitive price 2.With RoHs certificate 3.Suitable for medium to serious deafness Hearing aids Behind the Ear(BTE)Specification:max.saturation sound pressure level:125dbfull-on acoustic gain>45dbfrequency response:450-3800hzEquivalent input noise:<30dbOperation voltage:1.5vOperation Current:10.8mA
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