The SD-651 is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt, and insects.
System Sensor® SpectrAlert® Advance selectable-output horns, strobes and horn/strobes are rich with features guaranteed to cut installation times and maximize profits.
Mount it on a ceiling or wall - the L-PBM20A offers you the flexibility for any indoor or outdoor requirement. Ideal for applications like galleries and shopping arcades, this speaker complies with mu