C-109 Behind-The-Ear Super Power BTE Hearing Aids
k-89 New Best Rechargeable Wireless Hearing Aid Headphones BTE Sound Amplifier for the Deaf Elderly
| Product model | k-89 |
| Working voltage | |
| Battery capacity | |
| Endurance | |
| Maximum OSPL90 | |
| High frequency average OSPL90 | |
| high-frequency average | |
| Total harmonic distortion | |
| Frequency Response Range | |
| Equivalent input noise level | |
| Product size | |
| Weight |
