Functions and Features:
●  Master stations of ten-route intercoms may connect

    ten pairs of intercom extensions for visitation at one

    time.
●  The master station may set, control and display talk

    time of each intercom extension and display if each

    extension is in talk by LED.
●  Listen in the talk of each extension (or with

    earphone), with realistic and clear voice and

    adjustable volume, and there is no consciousness

    in the extension.
●  The master station has recording jack which may

    output audio signal to achieve the recording function.
●  Easy installation, connect the extensions with

    non-polar N+1 cored wires. (the maximum

    transmission distance 1Km).
●  The 18V2.5A switch-mode power supplies will be

    delivered together with the master station
●  Size: 220x200x55mm(LxWxH)

Details about Master stations of ten-route intercoms

Functions and Features:
●  Make up of twenty-route, thirty-route, forty-route and

    fifty-route master stations by matching with ten-route

    master stations.（possess all functions of the

    master station after matching）

●  The master station may set, control and display talk

    time of each intercom extension and display if each

    extension is in talk by LED.
●  Listen in the talk of each extension (or with

    earphone), with realistic and clear voice and

    adjustable volume, and there is no consciousness

    in the extension.

● Size: 100x200x55mm(LxWxH)

Functions and Features:
●  The twenty-route intercom master station may

    connect 20 pairs of intercom extensions for visitation.

●  The master station may set, control and display talk

    time of each intercom extension and display if each

    extension is in talk by LED.
●  Listen in the talk of each extension (or with

    earphone), with realistic and clear voice and

    adjustable volume, and there is no consciousness

    in the extension.
●  The master station has recording jack which may

    output audio signal to achieve the recording function.
●  Easy installation, connect the extensions with

    non-polar N+1 cored wires. (the maximum

    transmission distance 1Km).
●  The 18V2.5A switch-mode power supplies will be

    delivered together with the master station

●  Size: 320x200x55mm(LxWxH)

Functions and Features:

●  Each pair of substations will be used with only one

    master station. Intercoms can be realized after

    picking up the substation. Crispy voice. The

    substation and master station are connected with

    N+1 wire non-polarized cable.
●  The conversation time is set as 20 minutes at

    factory. The master station will cut off the power of
    the substation after 20 minutes’ talk. And the power

    will restore after the substation is hang off for one

    minute. The time will be counted down from at the

    moment when the substation is picked up. The

    communicating time will be displayed on the LCD.

    “Bi, Bi” voice prompts will sound every 20 seconds

     when there is only one minute left.

●  Size: 195x65x55mm(LxWxH)

Details about Extension

Functions and Features:

●  Each monitoring substation can be connected with

    a pair of WBT-A substations in parallel.
●  Can monitor the talk of corresponding substation

    with vivid and clear voice. The volume can be adjusted.
●  Can break in the substation
●  Can cut off the talk of corresponding substation
●  Can display conversation time of the substation

    through LED. The time will be counted automatically

    when the substation is picked up.
●  Specially used in prison to monitor and control the

    visit conversation.

● The attached power supply shall be provided, model:

   988-03  DC6V500mA

● Size:140x138x55mm(LxWxH)

Details about Monitor extension