Edwards Signaling SB4U-LF Low Frequency Audible (Sounder) Base NEXT The key cannot be removed

The key cannot be removed when in the “TEST” position

We hold more than 200

bone and connective tissue in order to reduce pain

They are constructed from heavy duty 16 gauge cold rolled steel (CRS) for maximum durability

Simple and quick programming

Edwards Signaling SB4U-LF Low Frequency Audible (Sounder) Base NEXT The key cannot be removedEdwards 520 Hz sounder bases add UL 464 listed low frequency audible output to the entire Edwards line of intelligent smoke, heat, and CO detectors. When mounted with a matching detector, they provide a clean finished appearance and high performance audible output. The integrated appearance of combined detector and base offers a low profile and unobtrusive alternative to separately installed horns and detectors. It also reduces installation costs by