Z-128 Mini Invisible Rechargeable Digital Hearing Aid Personal Sound Amplifier(Skin Color)

1. Ergonomic design, soft and comfortable, fits perfectly in the ear canal, will not fall off even if wearing glasses, natural appearance and almost invisible, you don't have to worry about being embarrassed to wear this device.
2. The 2 hearing aids do not distinguish between left and right ears, pick up and use, very user-friendly.
3. Fully charged in 2 hours, the hearing aids can be used continuously for more than 40 hours. The magnetic charging stand (built-in battery) provides an additional 180 hours of backup power, and both hearing aids can be charged 3-4 times.
4. You can press and hold the "Volume Down" button for 4 seconds to change to "Noise Cancellation Mode" or "Normal Mode".

Parameters:
1. Maximum sound output: 129+/-3dB
2. Sound gain: greater than or equal to 40dB+/-5dB
3. Total harmonic distortion: less than or equal to 6%
4. Frequency range: 350-4500MHz
5. Input noise: less than or equal to 28dB+/-3dB
6. Voltage: DC 1.2V
7. Current: less than or equal to 1mA
8. Fully charged in about 2 hours
9. Working time more than 40 hours
10. Can be charged via magnetic charging base