Specifications:

Bluetooth Pocket Hearing aid

Max Sound Output: 127±4 dB

Max Sound Gain: 48dB ± 5dB

Harmonic Wave Distortion: ≤5%

Frequency Range: 250～3800 Hz

Input Noise: ≤30 dB

Battery: Lithium Battery                

Working Voltage: dc 3.7V                     

Working Current: ≤4mA        

Color: As the picture shows

Item Size: 4.35*2.0*1.3cm                                                                                                                              

Package Size: 15.3 x 9.6 x 3.8cm                                                                                                                    

Package included:

1 x A-155 Hearing aid

3 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 and plugged， make sure no air leakage.

Keep the ear plug clean

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