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 window.
1.Usage: the bank staff use the master station to talk with guests, and the guest 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.
3.Application: bank, stock office, hospital, post office, Box office, Toll station, etc.

Functions and Features:
1)Hands-free two-way talkback with full automaticity, microphone is clear for both side;
2)Microcomputer controlled circuit with squelch function, can solve echo and squeal problems;
3)Adopts high-powered mic, the voice is lifelike and clear;
4)Easy installation, there is only one wire for master station and substation connection.
5)Volume of master station and substation can be adjusted separately.
6)With recorder jack, can output both route's sound and signal.
7)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.

Specification:
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: 3M
Main base Dimension: 162*110*40mm
Substation dimension: 80*20mm
Material: plastic

Packaging List:
1 x Dual-way counter interphone
1 x External speaker
1 x Charger
4 x Adhesive
1 x English User Manual

Is Electric	Yes
Power Source	Corded Electric, dc
Input Voltage	220 Volts
Number of Power Levels	2
Speaker Maximum Output Power	2 Watts
Connectivity Technology	Auxiliary
Item Weight	0.55 Kilograms
Number of Audio Channels	2.0
Frequency Response	1.5E+4 Hz
Compatible Devices	Laptop, Desktop, NA, NA, NA, NA, NA
Number of Microphones	2
MP3 player	No
Processor Count	1
Specific Uses For Product	Business
Controller Type	Button
Color	Black
Is Waterproof	False
Audio Output Mode	Stereo
Mounting Type	Window Mount
Material Type	Plastic
Speaker Type	Multimedia
Additional Features	Noise Canceling
Recommended Uses For Product	For Banks, Ticket Offices, Hospitals, Post Offices, Securities Windows, Embassy Visa Offices, Securities Companies, Stations with Security Glazing

Window Speaker Intercom System Anti-Interference Dual Way Intercommunication Microphone and Speaker Interphone Mute Function Bank Window Intercom for Office, Restaurant, Store, Bank

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