Siemens SLSWW-AL 17/12 It provides clear sound and

It provides clear sound and bright light

They fit into a standard 4‐inch square or double‐gang electrical back box

D4120W duct smoke detector features a pivoting housing that fits various applications: both square and rectangular footprints mount to round or rectangular ductwork

The module has a panel-controlled LED indicator

Siemens SLSWW-AL 17/12 It provides clear sound andFormed as the `SL series, Siemens is now offering horns, strobes, and horn strobes with LED based strobes to its notification appliances portfolio. With the `SL series, Siemens offers a full range of products with low and high candela settings that makes these sophisticated notification appliances ideal for new installs and retrofit applications. Innovative light emitting diode (LED) strobe technology provides an energy efficient means for a