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Replaceable earplugs convenient Hearing aids
$20.00
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Max Sound Output: 135±5dB
Sound Gain: ≥40dB
Total Harmonic Wave Distortion: ≤5%
Frequency Range: 300-5000Hz
Input Noise: ≤30dB
Voltage: USB 5V/50mA
Current: ≤8mA
Battery: rechargeable battery