Max Sound Output: 129dB ± 4dB
Max Sound Gain: 50dB ± 5dB
Harmonic Wave Distortion: 5%
Frequency Range: 450~3500 hz
Input Noise:30 Db
Battery: Lithium Battery
Working Voltage: DC 3.7V
Working Current: 3 mA
Special Function Key: Rechargeable
1 x Hearing Aid
1 x Charger (110-240v)
4 x Earplugs
1 x User Instructional Brochure
1 x earphone
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.
- SOUND DISTORTION SMALL:selectively amplifies speech, separating it from background noise and sounds using energy-efficient, twelve-band digital sound processing helping you understand ;
- EASY TO USE:A key switch, a key volume adjustment, a look that will.
- WEARING COMFORT?Easy and comfortable, one-finger operation,Noise reduction control through digital chip;
- ADJUSTABLE VOLUME?Digital volume and frequency program fitting as demanded by different needs;conversation more easily;
- With adjustable sound level, frequency, treble and bass you can adjust the amplifier to suit you.