Specifications:
BTE Hearing aid:
Max Sound Output: 127±4 dB
Max Sound Gain: 48dB ± 5dB
Harmonic Wave Distortion: ≤5%
Frequency Range: 450~3500 hz
Input Noise: ≤32 dB
Battery: AG13 Button batteries (Included)
Working Voltage: dc1.5V
Working Current: ≤3mA
Color: As the picture shows
Item Size: 4.5 x 4.2 x 1.0cm
Package Size: 12.0 x 7.5 x 3.5cm
Net Weight: 8g

Package included:
1 x V-185 Hearing aid
6 x Earplug (different sizes)
2 x button cell battery
1 x User manual
1 x Box

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.