Digital Mini Hearing Aids Invisible In Ear Small Sound Voice Amplifier Enhancer
2 x Sound Amplifier. Adjust to either ear. Input noise: ≤50dB. Help you hear the sound clearly and loudly, whether indoors or outdoors. Max sound output: 110±5dB. Sound gain: ≥30dB. 1 x User Manual. Frequency range: 250-3800Hz.