Superior Signals Inc. offers the 2100 Series Safe-T-Alert back-up alarm. The STA2100 series operates from 12-24 VDC, has a decibel rating of 97dB, 102dB and 107dB, and is available with wire leads only. The 2100 series conforms to SAE J994 Type B and C, and are UL- and CE-listed. Applications for this alarm range from light industrial to heavy construction equipment. Superior Signals Inc., Card No. 191