Opara ZDC-901A Hearing Aid In The Ear Voice Amplifiers Low Distortion Ear Aid Sound Enhancers For Elder People Deafness (Blue Left Red Right)+2 Batteries , Couple

Parameters:    MAX-SSPL90: 118+3 dBSPL
HFA-SSPL90: 110±4dBSPL
Peak Gain: 33dB
HFA Full-on Gain: 30±5dB
Frequency Range: 200-4000HZ
THD : ?10%
Eq.Input Noise Level: 28dBSPL
Battery Current Drain: 0.6mA
Attack Time: 6ms
Release Time: 22ms
1.The wire plug connected to the headset.Then earplug connector (hard) to the headset, earbuds (silica gel) to connect to the headphone connector pedestal   
2.The battery installation: Gently open the battery compartment cover, put a battery into the battery compartment in the right direction, then close the battery compartment .
3.Before you use this item ,you have to turn the ON-OFF switch to Off,and turn the sound volume to minimum
4.Then put this item on you ear, keep it tightly
5.Next, turn this item ON, adjust the volume until you hear clear sound

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.  
Please regularly clean the ear plugs or ear molds in order to ensure the normal use of hearing aids.
Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing aid components.

Product Features

  • SOUND DISTORTION SMALL: derived amplifies speech, separating it from background noise and sounds using energy-efficient, twelve-band digital sound processing you
  • 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;
  • Package Content: 1 x Hearing Aid, 2 x A10 batteries, 1 x Cleaning Brush, 6 x Earplug (Different Size)
  • Use for long periods of time, please remove the batteries to prevent battery rot erosion hearing components.

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