Features:
1.Brand new and high quality invisible hearing aid sound amplifier
2.Super mini size and light weight, not easily to be seen
3.Adjust volume to the minimum before wearing
4.Increase volume gradually to avoid sudden increase in sound
5.Convenient for watching movie, enjoying the drama, attending meeting, or having class, it could help you hear the sound clearly and loudly

Specification:
100% Brand new and high quality
Color: As the picture shows
Mini Hearing aid
Max Sound Output: ≥120 dB
Max Sound Gain: ≥30 dB
Harmonic Wave Distortion: f<1000Hz≤10%,f>1000Hz≤4%
Frequency Range: 250～3800 Hz
Input Noise: ≤50 dB
Battery: AG3 Button battery     
Working Voltage: dc1.5V
Working Current: ≤4mA
Item Size: about 1.9 x 1.4 x 1.6cm
Net Weight: 3g

Package Included:
1 x Hearing aid/2 x Hearing aids
4 x Earplug (different sizes)/4Pairs x Earplug (different sizes)
2 x Button battery/4 x Button battery
1 x User manual
1 X Exquisite Storage box
1 X Package box

Use:
1.Adjust volume to the minimum before wearing.
2.Choose an earplug of slightly bigger size to avoid whistler.
3.Increase volume gradually to avoid sudden increase in sound.
4.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.
5.Please keep the ear plug clean
6.Remove the battery if you don't use it for long time.

Note:
1.The colors may be a little difference for the different monitor display.
2.Please check as much as possible to make sure the item is the one that you need.
3.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)