Cheap Price Hearing Aid for Seniors Rechargeable, Single Ear Hearing Amplifier Aid for Adults, Hearing Assist Device with Charging Base, Clear Sound, Beige

1) How to use this hearing device?
1.Charge the hearing aid to full battery before the first time use.
2.Install the proper size earplugs to hearing aid, turn on and adjust the volume.
3.Insert the hearing aid into your ear canals tightly to prevent howling, start to use.


2) How to prevent howling(squealing)?
1.Insert the hearing amplifier into your ear canals tightly.
2.Using a larger size earplugs to prevent the howling.
3.Turn down the volume.

Specifications:
Max Sound Output: 125±4dB
Sound Gain: ≥30dB
Total Harmonic Distort: ≤10%
Frequency Response: 450Hz~4000Hz
Input Noise: ≤30dB

Package Included:
1 Hearing Amplifier
1 Charging Base 
1 Charging Cable
1 Power Adapter
1 Cleaning Brush
1 User Manual
1 Small Screwdriver
4 Earplugs