Surface Mounted Entry System – STS-K009


This system provides high quality sound across partitions and safety screens. It includes our surface mounted entry unit, our STS-A31H Amplifier, an under the counter hearing loop and a free-standing microphone and speaker unit for staff.

The surface mounted entry unit is for customer use and should be installed at head height. A call button is on the front of the unit that when pressed alerts staff to a customer’s presence and opens the communication channel.

It is best suited for environments with low ambient noise.


For use where one to one communication takes place through a safety screen or similar barrier, such as:

  • Distribution Centers
  • Public Transit
  • Correctional Facilities
  • Warehouse Entry
  • Security Entrances

System Components

STS-A31H Window Intercom Amplifier

Our amplifier provides full open duplex communication and is compatible with all our window intercom products.

STS-SU1 Staff Unit

Our free-standing combined speaker and directional microphone module for the staff side

Surface Mounted Entry Unit

The surface mounted entry is for customer, with a call button the front of the unit.

Under the Counter Hearing Loop Aerial

This hearing loop aerial is for use with our Window Intercom Systems. It is installed under desks or counters.

PS-55 Power Supply

The PS-55 Power Supply is a Level VI power supply for use with the STS-A31H Window Intercom Amplifier.

Window Intercom Hub

Visit our Window Intercom Hub for more information about our systems and for help choosing the right one for your application.

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