Eaton has developed the Wheelock Exceder LED3 Low Frequency Sounder Strobes (LFHSK3/LFHSH3) and Sounders (LFHNK3) to meet the National Fire Protection Association (NFPA) low frequency sounder requirements for sleeping rooms – NFPA 72 for fire alarm and NFPA 720 for Carbon Monoxide (CO) alarm. In a single device, the Exceder LED Low Frequency Sounders can provide alarm signals for dual applications – T3 (Fire) and T4 (CO) tones. Eaton offers low frequency sounder strobe models for both low and high candela settings, ideal for retrofits and new construction.