520 Low Frequency Sounder
Model 520
Low Frequency Sounder 
The industry’s first Wireless Low Frequency Solution, the Model 520 is completely battery operated and fully supervised. Temporal 3 & Temporal 4 Notifications for smoke detector applications. The 520 provides extensive battery life and is the economical solution for applications requiring Low Frequency compliance such as:
- Hotels and Motels
- Colleges and Universities
- Condominiums and Apartments
- Military Barracks
A built in sounder test allows for accurate decibel level verification prior to installation. Synchronization can be achieved through interconnecting multiple units