La description
You can use the conversation between the inside and outside of the window for the customers’ evaluation of the salespersons, and for the supervisor’s evaluation of each windows.
1. Usage: the bank staff use the master station to talk with guests. and the guests use the substation can talk with bank staff as well.
2. Installation: the master station is installed in the working place and the sub station out of the working room. Just one wire connection between the master station and substation.
3. Applicaton: banque, restaurant ,stock office, hospital, post office, Box office, Ferr charge station Where guard glass again theft is installed 
Functions and Features:
1. Two-way voice intercom communications technology, automatic identification of processing speech signals during a call, does not require any action;
2. With power on /off and volume knob can control volume by worker
3. Have individual button to turn ON/OFF MUTE function for both of side;
When you turn on Outside-mute key, Outside guest can’t hear inside voice.
Also when you turn on Inside-mute key, inside worker can’t hear outside voice.
3. Dual-way audio record output; Dedicated anti-side tone processing chip with aoto-mute function
4. Has special side tone processing chip and the movement noise function can effectively improve the noise
5. The voice from this system is clear and natural; Has top-quality speaker and high-sensitive microphone. Especially the metal tube microphone is deal for the counter and the dual-way intercommunication
6. Main base Dimension:162*11*40millimètre
Substation dimension: 68*20millimètre
7.Matériel :plastic
Paramètres techniques:
working voltage: DC12V/0.5A
input voltage: AC 110-240V
work power : 2W,100Hz-15Khz
Inside microphone : -48db 20Hz-20Khz
Outside microphone: -48db 20Hz-16Khz
cable length : 1.8M
Packaging List:
1 x Dual-way counter interphone
1 x External speaker
1 x Charger
4 x Adhesive
1 x English User Manual
