C-109 Behind-The-Ear Super Power BTE Hearing Aids
D-501B Rechargeable BTE Hearing Aids for the Deaf Manufacturer bluetooth Hearing Aids Wholesale Cheap
| Product model | D-501B |
| Working voltage | 3.7V |
| Battery capacity | 60mAh |
| Endurance | About 25 hours |
| Maximum OSPL90 | ≤128dB+3dB |
| High frequency average OSPL90 | 116dB±4dB |
| high-frequency average | |
| Total harmonic distortion | |
| Frequency Response Range | |
| Equivalent input noise level | |
| Product size | 42.8×17.9×10.7 |
| Weight | 5.2g |
