1. Maximum saturation sound pressure ≥ 110dB ± 5dB pole
2. full block sound gain: ≥ 30dB
3.The average gain: ≥ 40dB
4.Equivalent noise: ≤ 40dB.
5.Frequency Response: 300Hz-4000Hz
Standard battery: AG3 button batteries
Operating voltage: DC1.5V
Operating Current: ≤ 4mA
Product weight: 3g
Product size: 2 * 1.9 * 1.5cm
Package: paper + plastic box
Package size: 11.1 * 8.4 * 3.3cm
QTY: 120PCS
Carton 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