1Pc Hearing Aid Aids Kit Behind the Ear BTE Sound Voice Amplifier fits for Left or Right

Features:
Accurate and easy to use
Volume can be adjusted with 4 levels.
Help you hear the sound clearly and loudly, whether indoors or outdoors.
Maximum loudness 130 +/- 5dB.
Sensitivity: >= 50dB.
Frequency range: 300Hz ~ 4000Hz.
Battery Type: AG13 button cell battery (included)

Step1: Pair earplug

Choose the earplug as per your ear size

Step2: Equip Battery

Insert the battery according to the positive and negative terminals of the battery

Step3: Start up

Chose battery cover , slide + / – to adjust the volume

Step4: Wear hearing aid

Put the ear hook on the hard of hearing , put the earplug into ear

The degree of hearing loss level

00-40 dB: normal

41-55 dB: mild to moderate hearing loss (inaudible little voice, face to face short-range loud (normal) speech audible)

56-70 dB: moderate deafness (basically talking loudly on the face of the exchange, the exchange of other cases is very difficult)

71-90 dB: severe hearing loss (basic language can not communicate, you need to talk loudly in the ear can hear a little)

90 db: very severe hearing loss (need ear can only hear the cries of force shout, usually basically silent world)