Industrial heavy-duty backup alarm produces a powerful 97 to 102 dB beeping sound, alerting pedestrians and other vehicles in the area. Ideal for heavy-duty use for 12–48 Volt vehicles.The electronics are sealed in rock-hard epoxy for all weather usage. Mounting bracket is zinc coated for corrosion resistance. Easily installs to any one- or two-wire systems. Meets OSHA standards.