1.Max Out: ≥120dB
2.Max Gain:≥30dB
3.Average Gain:≥38dB
4.Harmonic Distortion:a)≥10% (Frequency< 1000Hz)

                                  b)≤4%(Frequency >1000Hz)

5.Equvi Input Noise:≤30dB.
6.Frequency Range:≥250Hz~3500Hz

"NO"--Put on;
"OFF"--Put off.recharge;
""--Volume small to round.
Standard Battery: AG3 or AG312 button cell
Voltage: D.C. 1.5V
Current: ≤4mA
Product Weight:3g
Product Size:2.*1.9*1.5cm
Colour: Beige
Material: ABS
Package:Paper+ Plastic Box
Packing size:11.1*8.4*3.3cm
Carton quantity:120PCS
Catron Size:52.5*31*39cm
GW:11kg
NW:9kg

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.

1 x Hearing Aid

1 x Cleaning Brush

1 x Instruction manual (English)

•Available
•Delivery within 3 days 

•one year

We send the products  by sea or by air accroding to the demand of customers