Rechargeble Digital Hearing Aid mini Adjustable Tone Sound Amplifier
Built-in 25mAH recharging battery for hearing aid unit. Total harmonic wave distortion: ≤3%. Input Noise: ≤32dB. Max sound output:125±3dB a3. Sound gain: ≥28dB±5dB. Charing light in Orange color, full charing in Greeen color.