USB Rechargeable Hearing Aids Mini Ear Hearing Amplifier Adjustable

Features
•The hearing aid come with rechargeable function, no need to change battery
•The hearing aid combines a cosmetically appealing look with the smooth sound an internal speaker
•This hearing aid channel digital sound processing allows the user to control volume

Specification
Max OSPL: ≤129dB±3dB
Max Sound Output: 117dB±4dB
Max Sound Gain: 38dB±5dB
Frequency range: 450Hz-3000Hz
Total Harmonic Wave Distortion: ≤10%
Input noise: ≤28dB

Charging time: 4-6H(8H for the first charge)
Available time: 40H (Depending on amplification power)

"OFF"---Power off button
"H"-----Low frequency compression mode
"N"-----Normal usage mode
"1-4"---Sound volume

Package included
1 x Hearing aid
3 x Earplug (Different sizes)
1 x User manual (The user manual is given at random.)
1 x Black Box
1 x USB charging cable without the charge head (Recommended with 1-2A charging head)

Instructions

Kindly Remind
1.Adjust volume to the minimum before wearing.
2.Choose an earplug of slightly bigger size to avoid whistler.
3.Increase volume gradually to avoid sudden increase in sound.
4.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. 
5.Keep the ear plug clean.

6.Turn off the hearing aid if you don't use it.

Notice

1. Please use the original charging head and charging cable for charging. Otherwise the product may be damaged.