Elderly Senoir Hearing Aids In-ear Sound Amplifiers Voice Enhancer Rechargeable
£11.51
It can continue use up to 72-96 hours. Equivalent input noise level: ≤ 29dB+3dB. Output sound pressure level (high-frequency average): 108dB ± 4dB. Full range sound gain (largest gain): 35dB ± 5dB. Full range sound gain (average gain): 30dB ± 5dB.
