Specifications:
Easy type digital hearing aid
Max Sound Output: 127±4 dB
Max Sound Gain: 52dB ± 5dB
Harmonic Wave Distortion: ≤5%
Low Frequency: 580Hz~~2.8KHz
Middle Frequency: 700Hz~~4.8KHz
High Frequency: 780Hz~~7.8KHz
Wide Frequency: 910Hz~~10.5KHz
Input Noise: ≤30dB
Battery: Lithium Battery
Working Voltage: DC 5V±0.5V
Working Current: ≤8mA
Color: As the picture shows

Package included:
1 x E-8 Hearing aid
8 x Earplug (different sizes)
1 x EU Plug Charger (110-240v.)
1 x User manual

Note:
Adjust volume to the minimum before wearing.
Choose an earplug of slightly bigger size to avoid whistler.
Increase volume gradually to avoid sudden increase in sound.
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 ， make sure no air leakage.
Keep the ear plug clean
Remove the battery if you don't use it for long time.