Portable mini Invisible Deafness hearing aids for the deaf Clear Sound Amplifier

3 full sound gain (maximum gain) : 35dB±5dB. Full sound gain (average gain) : 30dB±5dB. Gross weight: 28g. Accessories: Earplug x 3, Cleaning brush X 1, A10 Battery x 2 PCS. Equivalent input noise level: ≤29dB+3dB.

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