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
5) choice of earplugs and plugged, make sure no air leakage.
6) Keep the ear plug clean.
7) Remove the battery if you dont use it for long time.

Specifications:
Pocket Hearing aid
Max Sound Output: 129±4 dB
Max Sound Gain: 58dB ± 5dB
Harmonic Wave Distortion: f<1000Hz≤15%,f＞1000Hz≤10%
Frequency Range: 450~3500hz
Input Noise: ≤30 dB
Battery: 1 x AA battery (No included)
Working Voltage: dc1.5V
Working Current: ≤4mA
Color: As the picture shows
Item Size: 6.1 x 4.1 x 1.6cm
Package Size: 18 x 9.8 x 3.8cm

Package include:
1 * Hearing Aid
4 * Earplug(Different Size)
1 * Instruction manual (English)
1 * Black storage bag

Hearing aid you receive will not come with AAA battery,as it can not ship by air.
Retail Box is no include, but we can package it well.