Product Description
Pocket Hearing aid: Black color
Max Sound Output:  129±5dB
Max Sound Gain: 55dB ± 5dB
Harmonic Wave Distortion:  ≤5%
Frequency Range: 450~3500 hz
Input Noise: ≤30 dB
Battery:5# dry battery
Working Voltage: dc1.5V
Working Current: ≤4mA
				













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