F-138 DC 1.5V Earhook Hearing Aid Sound Amplifier

1. This hearing aid earphone is almost invisible when worn, easy to hide and comfortable to wear.2. Layered noise reduction, providing you with high-quality voice, allowing you to enjoy clearer conversations immediately.3. Adjust the volume with the touch of a button to help you listen to the sounds of nature.4. With advanced magnification technology, it can help you anytime and anywhere, suitable for the elderly.5. Small in size and light in weight, it helps you get rid of the shackles of earphone wires, and is convenient for watching movies and enjoying dramas, etc.Parameter:1. Maximum sound output: 129dB+/-4dB2. Maximum sound gain: 50dB+/-5dB3. Harmonic distortion: less than or equal to 5%4. Frequency range: 450~3500 Hz5. Input noise: less than or equal to 30dB6. Battery: AG137. Working voltage: dc1.5V8. Working current: less than or equal to 4mA