For municipalities and towns
Wireless public address system for municipalities and towns
A modern municipal public address system without excavation work. We mount the speakers on street light poles, the system keeps working during a blackout, and we take care of grants, installation and service for you.
- No excavation or cabling
- 72-hour blackout backup
- Speakers report faults themselves
- Free solution proposal

Why a Crisis One wireless public address system
A public address system that doesn't require digging up streets and doesn't go silent during a power outage.
How the wireless public address system works
From the broadcasting station to the speakers in the streets, without a single cable.
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1
Broadcasting station
Start announcements from the CO 101 station: live into the microphone, from pre-recorded messages or using scenarios for different types of events.
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2
Digital radio transmission
Announcements travel straight to the speakers over a digital two-way radio network with high resistance to interference. No cables, no excavation.
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3
Speakers across the municipality
Speakers on street light poles play the announcement or siren signal. Where more acoustic output is needed, we use the 100 W CO 300.
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4
Monitoring and service
The system continuously monitors the speakers, alerts you to faults and communication failures and keeps an event history. We provide service 24/7.
Wireless public address components
Broadcasting station and wireless speakers directly from the manufacturer.

CO 101 — Control Center
- central control terminal
- 72-hour battery backup
- JSVV compatible

CO 300 — Wireless speaker / siren
- wireless broadcasting/siren
- 72-hour battery backup
- street light pole mounting

CO 301 — Compact wireless speaker
- compact design
- 72-hour battery backup
- lightweight, durable, IP44
Grants and financing
We map Czech and European grant programmes, select a suitable financing option, prepare the application documents and make sure the grant conditions are met. If no grant is available, we offer our own installment plan as the manufacturer.
Explore financing optionsFrequently asked questions
Does a wireless public address system need excavation work?
No excavation or cable laying is needed. The speakers are wireless and we mount them on street light poles, so disruption for residents is minimal. A typical speaker installation takes a few hours.
Will it work during a power outage?
Yes. The broadcasting station and the speakers have integrated backup power for at least 72 hours. The speakers can also operate on their own if they lose connection with the broadcasting station.
How do we know the speakers are working?
The speakers communicate with the broadcasting station in both directions. Each one continuously confirms its availability and readiness to broadcast and reports its service status if a fault occurs. We provide monitoring and service 24/7.
Can the system be connected to the Czech JSVV?
Crisis One components can be integrated into the Czech Unified Warning and Notification System (JSVV) as required by the Fire Rescue Service of the Czech Republic. Connection of an end device to the JSVV is approved by the regional fire rescue service (Section 9(7) of Decree No. 380/2002 Coll.). We discuss the procedure with you when designing the solution.
Which frequencies does the system use?
The system uses digital two-way radio communication in the 66–85 MHz band with QPSK modulation. In the Czech Republic it operates under an individual licence from the Czech Telecommunication Office.
Can the system be extended later?
Yes. The system has a modular architecture, so you can gradually add more speakers, electronic sirens, communication channels and sensors, or connect it to higher-level systems.
Can we get a grant for a new public address system?
We help you find a suitable Czech or European grant programme, prepare the application documents and make sure the grant conditions are met through to the final settlement. If no grant is available, we offer our own installment plan as the manufacturer.
Does a municipality still need a public address system when there are mobile phone alerts?
Public address systems and sirens reach everyone outdoors or at home, including people without a mobile phone. The Crisis One system communicates over its own radio network and, thanks to the 72-hour backup, keeps working even when the usual infrastructure fails.
Get a free solution proposal
Tell us a little about your municipality and your current public address system. We'll get back to you and prepare a free project plan and coverage proposal.