Portable Hearing Aid Mini Ear Sound Amplifier Adjustable Ear Hearing Amplifier Aid Kit Tone Hearing Aids for the Deaf/Elderly

Hearing aid
MaxSound Output: 130±5 dB

MaxSound Gain: 55±5 dB 
Harmonic Wave Distortion:≤10％(1000Hz)
FrequencyRange: 300-4500 Hz
Input Noise:≤30 dB

Battery: AG13 Button batteries (Randomly ship one battery or without battery.)            

Working Voltage: dc1.5V                      

Working Current:≤3mA             
Color: As the picture shows
Item Size: 3.8 x 2.1 x 0.9 x 3cm
Package Size:  19 x 8.2 x 2cm
Net Weight: 9g

Package included

1 x JZ-1088A Hearing aid 
3 x Earplug (different sizes)
1 x User manual
1 x Box ( optional )


Note
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.Remove the battery if you don't use it for long time.