Powertone F-138 In-Ear Hearing Aid is a quality hearing aid which can help you hear the sound clearly and loudly. The volume can be adjusted to 4 different levels.
- Accurate and easy to use. - Volume can be adjusted with 4 levels. - Helps you hear the sound clearly and loudly, whether indoors or outdoors. - Maximum loudness 130 +/- 5dB. - Sensitivity: >= 50dB. - Frequency range: 300Hz ~ 4000Hz.