System Sensor SPCWL L Series Ceiling Mount Speaker White SYSTEM SENSOR SBBWL 4x4 Wall Surface Mount Grelly USA System Sensor Red L Series Wall Surface Back Mount Speaker & Strobes System Sensor (SBBSPW) Wall mount speaker surface mount back box, white SYSTEM SENSOR SPECTRALERT Advance SBBW Wall Mount Surface Mount Back. Surface Mount Back Box, White, wall mount, compatible with speakers and speaker strobes Specification's Weight 0. 4 lbs Color White Mounting Wall Series L Series: Notification Appliances Condition New Brand System Sensor Production Status Active Open Datasheet