Hearing Aid Elderly Ear-hook Type Hearing Aid Headphones

1. Material: ABS
2. With button battery LR44
3. Battery voltage: DC 1.5V
4. Sound output: 130±5dB
5. Frequency range: 300-4500Hz
6. Harmonic distortion: less than or equal to 10%
7. Input noise: less than or equal to 32dB
8. Size: 5.5x1.6x1cm
9. Weight: 8.8g