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)
