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potable and rechargeable Hearing Amplifier
$10.86
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Max Sound Output: 130±5dB
Sound Gain: ≥50dB
Total Harmonic Wave Distortion: ≤5%
Frequency Range: 300-4000Hz
Input Noise: ≤30dB
Voltage: USB 5V/50mA
Current: ≤4mA
Battery: rechargeable battery
