cleaning hearing aid A,Max.saturater volume output:128 dB B,Max voice gain:40 dB cleaning hearing aidA,Max.saturater volume output:128±5 dBB,Max voice gain:40±5 dBC,Harmonic distortion:≤10%(1000Hz)D,Equivalent input noise level: 30dBE,Frequency range:300—4500HzF,Battery voltage:DC 1.5V(The A76 button battery a grain)