C-109 Behind-The-Ear Super Power BTE Hearing Aids
D-502B Elderly Wireless Earphone Behind Ear & Hearing Products Hear Amplifier Rechargeable Hearing Aid
| Product model | D-502B |
| 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 |
