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Audio Monitoring Kits
Audio Monitoring Kits

ASK-4®#501 TLI-CS



  • Desktop base station with built-in microphone and speaker
  • Line Level input/output (RCA jacks)to NVR for recording and playback
  • Volume control for both listen and talkback


  • Microphone and speaker mounted on an aluminium grill
  • Omni-directional microphone, within 30′ diameter

The ASK-4® #501 TLI-CS is a single zone audio monitoring system with two-way listen and talkback. Remote surface ceiling mounted unit contains a microphone and a speaker, all within one housing. Desktop base unit produces live audio and playback. Talkback from base unit to remote speaker/microphone is actuated by engaging the “push to talk” switch and speaking into the built-in microphone. Person at the remote speaker/microphone can listen and talk hands-free. Input/output to NVR/video system for recording and audio playback. Includes two back boxes for flush or surface mounting.

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5-Year warranty
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Audio Monitoring Notice

When this equipment is used as part of an audio monitoring system, the law requires that the public be given notice of AUDIO MONITORING ON THE PREMISES.
Two decal notices are included with each microphone shipped.

Federal Law References: Federal Regulations, US Code, Title 18, Crime and Criminal Procedure. Sec 2510.


What's in the box

TLI-CS, AP-1TB, AD-1, Dual RCA Cable (6ft.)

Installation Requirements



  • NVR
  • Video System


Base Station Dimenmsions
8.25″‘ L x 5.75” W x 1.375’ H
Faceplate Dimensions
12.875″ Diag. x 2.75″ D

Product Comparison

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Requires Two-Way Base Station
Sensitivity Switch: Normal/Low
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Have a question about the ASK-4®#501 TLI-CS? Contact us directly.
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How to Buy

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Other Worldwide Regions
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