The ELK-71 is a Two-Tone (Yelp & Steady) Siren mounted in an attractive surface mount plastic enclosure. This versatile Echo™ Series siren is designed to be heard but not seen!. Sound “echoes” off mounting surface from back plate edge. This unique contemporary siren has a smooth, paintable, “no grill” surface that easily blends with any decor. This siren mounts to any fl at surface or single gang electrical “J” box. Also available is the ELK-74, a compact version of the ELK-71.