Hearing aid? When you watch movie? enjoythe drama? attend meeting? or have classes? the product can help you to hear the sound clearly and loudly. While in forest? if you want to hear very slight sound? it will be a good choice.

* Specification

1) Max sound output:110?5Db

2) Sound gain:?30dB

3) Total harmonic wave distorting:?10 ?

4) Frequency range:300-400Hz

5) Input noise: ?40dB

6) Voltage:d.c.1.5V

7) Current: ?4mA
Specification:
Package Weight
One Package Weight 0.32kgs / 0.70lb
Qty per Carton 40
Carton Weight 5.20kgs / 11.46lb
Carton Size 40cm * 20cm * 20cm / 15.75inch * 7.87inch * 7.87inch

Guaranty High Quality And Brand New
What You See Is What You Get