Designed to meet NFPA low-frequency signaling requirements for unattended sleeping areas, this new sounder base is a perfect solution for hospitality, education, and multi-occupancy residential applications. With the release of this new sounder base, and the previous launches of the Multi-Tone Horn and Audio System Upgrades, we now offer a complete spectrum of 520 Hz compliant solutions that allow you to provide your customers with a complete SIMPLEX solution for nearly any environment. =