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
Working Voltage: dc1.5V
Working Current: ≤4mA
Color: As the picture shows
Item Size: 5.3 x 4.4 x 1.0cm
Package Size: 7.5 x 10 x 3.2cm
Net Weight: 8g

Package included:
1 x X-168 Hearing aid
2 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 plug, make sure no air leakage.
Keep the ear plug clean.
Remove the battery if you don't use it for long time.