* APPROVAL: FCC, CE
 
* SPECIFICATION
  
 EZ-500P (Headphone)

a. Normal input power : 30mW

b. Maximum input power : 70mW

c. Impedance : 20W ¡¾ 20% (at 1kHz)

d. Headphone Sensitivity
  (1kHz / 1mW at Force Level):75dB(dB re 1.0 dyne)

e. With Amplifier Sensitivity
  (1kHz Volume Max. at Force Level)
   : 90dB (dB re 1.0 dyne)

f. Cord Length : 1200mm with F3.5 Stereo Plug

g. Weight : 80g
  
 
 EZ-S20 (Amplifier)

a. Frequency response (-40dB)  : 50Hz ~ 20kHz

b. Crosstalk : 40dB

c. Distortion (THD + N@ 1kHz) : less than 0.2%

d. Maximum output power : 100mW per channel

e. Power supply : 2 ¢¥ AAA Battery

f. Cord Length : 600mm with F3.5 Stereo Plug

g. Weight : 30g
 
* APPLICATIONS

: CD/ MD/ MP3/ FM Radio/ Walkman/ Music Appreciation/ Language learning for a long time duration of study – Back phone style

* Bone Conduction
How do recognize sound transmitted through your bones?

There are two hearing sense functions in the human body.

One is the Air conduction hearing sense that recognizes sound transmitted through air vibrations.

In general, it is the common way people experience hearing sounds.

There is a second hearing sense function which is called the Bone Conduction hearing sense which recognizes via Bone Conduction hearing sense, although most do not realize it.
The principle of the bone vibrator

The Bone Conduction Vibrator converts electric signals into mechanical vibrations.

Converted vibration signals go through the facial skin to the head bone and stimulate the hearing sense nerve via bone vibrations without the sounds going through the eardrum.
 
Why are the bone vibrator hearing sense and application so effective?

The Bone Conduction devices do not go into the structure of ear to detect sounds,

But instead are placed on the skin over the bone in front of the ear, which then transmit sound directly to the inner ear.
 
By utilizing the Bone vibrator, people are not only able to listen to all the ambient sounds around them via air conduction, but they are also capable of recognizing sounds being transmitted via bone conduction.

Therefore you have the advantage to all outside sounds while at the same time hearing totally different sounds independently conveyed via the Bone Vibrator. Utilizing the functions of the Bone Vibrator hearing sense makes this all possible.