Two Sets Of Hearing Aid Sound Amplifier Hearing Aid Headphones - Free Shipping
$29.95
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Two Sets Of Hearing Aid Sound Amplifier-Free Shipping1. Main unit (1) earplugs (4) battery (2) brush (1) earplug cleaning stick (1)Plastic gift box (1) English instruction manual2. Maximum sound output: 110±5dB3. Sound gain: ≥30dB4. Total harmonic distortion: ≤10%5. Frequency range: 300 - 4000 Hz6. Input noise: ≤40 decibels7. Working voltage: 1.5V (AG3 button battery)8. Working current: 4mA
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