Rechargeable Digital Hearing Aid Adjustable Tone 2024 Best Sound Amplifier Porta
Total harmonic wave distortion: ≤7%. Input Noise:≤32dB. Max sound output:118±4dB. Sound gain: ≥32dB±2dB. We do not accept P.O. Boxes. choice yes. Normal working about 35 hours. Full charging about 2-4 hours.