STS-K020 Retrofit Glass Mounted System

This window intercom system is specifically designed to retrofit into a glass window where an existing system has left a hole in the glass.  The glass mounted customer microphone is attached with two ballistic-proof polycarbonate plates that are threat level IIIA rated.  The kit comes with either a flush mounted overhead speaker (STS-S30) or an overhead speaker with a bracket (STS-S22).


For use in any situation where one to one communication takes place at a counter, booth or desk, such as:

  • Banks
  • Post Offices
  • Supermarkets
  • Ticket Kiosks
  • Information Centers
  • Airports

Product Sheet

Installation Manual

System Components

A31H Window Intercom Amplifier

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

STS-S23 Overhead Speaker Module

A surface mounted, sealed speaker for overhead installation.

STS-SU1 Staff Unit

Our free-standing combined speaker and directional microphone module for the staff side has an integral loudspeaker, microphone with a semi-rigid stem, adjustable neck and mute switch.

Anti-Vandal Microphone with Glass Mount Kit

Our customer side, anti-vandal, and screen mounted directional microphone with dual polycarbonate plates.

IL-AE98 Window Mounted Loop Aerial

This hearing loop sticker is installed onto the glass and has a built in hearing loop aerial.

PS-55 Power Supply

The PS-55 Power Supply is a Level VI power supply

InfoComm 2019: Contacta Unveils Its New STS-K020 Play

Window Intercom Hub

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