Tork Vehicular Backup Alarm APPLICATIONS: 1/2" conduit mounting. For outdoor use. All units must be mounted vertically with base at bottom. FEATURES: Solid state electronic unit. Helps to comply with OSHA and state regulations. Makes distinctive noise, ideal for extreme variations in background noise. VOLTS: 12 to 48VDC DESCRIPTION: 2 sound levels. 97 or 87 dB +/- dB at 4 ft. Multi-voltage Water-resistant housing.