Specifications:

 

BTE Hearing aid

Max Sound Output: 129dB ± 4dB

Max Sound Gain: 50dB ± 5dB

Harmonic Wave Distortion: ≤5%

Frequency Range: 450~3500 hz

Input Noise: ≤30 dB

Battery: AG13 button battery (included)            

Working Voltage: 1.5 V

Working Current: ≤4mA      

Color: As the picture shows

Item Size: 6.75 x 4.35 x 1.9cm                  

Package Size: 10 x 8 x 3.5cm  

Net Weight: 7g                 

 

 

Package included:

 

1 x F-138 Hearing aid

3 x Earplug (different sizes)

2 x AG13 button cell battery

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.