www.safetyandhealthmagazine.com/articles/warning-signal-alarm-2

Warning signal alarm

January 1, 2011
The Safety Sentry Warning Signal Alarm helps improve loading dock safety by alerting anyone nearby of a vehicle backing into the dock position. It features a 105 dB siren and strobe light combination system with motion-sensing technology. The durable, patent-pending design is rated NEMA 4 and constructed with ultraviolet-resistant polycarbonate using liquid tight strain relief connections.
Erich Industries Inc.