The ASK-4® #501 is a single zone audio monitoring system for two-way audio. The TLM-W remote unit contains a Verifact® line level microphone and a speaker, all within one housing.
The AP-1TB desktop base unit produces live audio and playback functions. Talk from the base unit to remote speaker/microphone is engaged by toggling the “hold to talk” switch and speakinginto the built-in microphone. A person at the remote speaker/ microphone can listen and talk hands-free.
AP-1TB:
- 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
TLM-W:
- Microphone and speaker mounted within ABS enclosure
- Omni-directional microphone, within 30′ diameter
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.
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- video system
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