Hearing Aid Sound Amplifier Ear Hearing Controller Earphone Long Ear Hook More Suitable For Your Ears

الوصف

Specifications:    Max Sound Output: 129dB ± 4dBMax Sound Gain: 45dB ± 5dBHarmonic Wave Distortion: ≤5%Frequency Range: 450~3500 hzInput Noise:  ≤30dBBattery: A675  button cell Working Voltage: dc1.5V                     Working Current: ≤3mA     Color: As the picture showsItem Size: 5.0 x 3.8 x 1.0 c Package Size: 9.0 x 7.5 x 3.2cm