Sound Amplifier Hearing Aid Voice Enhancement Device In The Ear For Elderly Volume Control Audifonos Like Siemens Headphone S-139

Features:

1. Normal-equal amplification across all pre-programmed frequencies.

2. Noisy - reduces background noise ( restaurant , wind & road noise ).

3. Outdoor-decreases overall sound gain , more comfortable.

4. Meeting - increases voice frequency , decrease base and high frequency sound.

Technical Parameters:

* Max Out :126 ± 4dB * Max Gain :47 ± 5dB * Harmonic Dist:≤ 5% * Frequency Range :300Hz ~ 4000Hz * Equivalent Input Noise :≤ 32 dB * Standard Battery:A13 Battery * Voltage :1.5V * Current :≤ 3.5 mA

Packing list:

Principal machine * 1

Earplugs * 3

Cleaning sweeper * 1

Warranty card * 1

User manual in English * 1

Battery* 1

Note:

- Adjust volume to the minimum before wearing.

- Choose an earplug of slightly bigger size to avoid whistler.

- Increase volume gradually to avoid sudden increase in sound.

-If you hear a howling,check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.

- Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids.

- Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing aid components.