1pair Rechargeable In-Ear Hearing Aid Elderly Sound Amplifier(Black)

1. Saturation OSPL (MAX): 116.99dB
2. High-frequency average OSPL: 113.35dB
3. Full-grade sound gain: 31.45dB
4. Frequency response range: not narrower than 290-6800Hz
5. Total harmonic distortion: less than or equal to 3 percent
6. Equivalent input noise level: 22.05dB
7. Rated power supply current: 1.5mA
8. Rated voltage: 3.7V
9. Hearing aid battery capacity: 42mAh; charging compartment battery capacity: 380mAh
10. Storage charging compartment, storage that is charging, to avoid dislocation lost
11. High-definition digital display, at any time to show the power, so that you can use more assured, get rid of the anxiety of no electricity
12. Lightweight design, comfortable to wear without burden
13. Rechargeable design, long-lasting battery life
14. Binaural wear, stereo sound, listening more comprehensive
15. Size: hearing aid 33 x 24 x 15mm; charging compartment 58 x 32 x 44mm