Equivalent input noise level: ≤22dB. Output sound pressure level (high-frequency average): <111dB. Frequency response range: F1 ≤300Hz, F2 ≥5000Hz.
Rechargeable 32-channel Clip-on Smart Noise-cancelling Digital Hearing Aid
Rechargeable Whistle-Free Neckband Hearing Aids 16-Channel DSP Digital Amplifier
Rechargeable Digital 32 Channel Ear Clip Hearing Aids Intelligent Suppression
OTC Hearing Aids for Hearing Loss - Rechargeable Case, Advanced DSP Technology
