Curtis multi-voltage audible alarms are designed to protect people working in proximity to material handling equipment and other types of vehicles. Available in voltages from 12 V to 72 V with output of 87 to 97 dBa. 12 to 48 V is available with output between 82 dB and 107 dB. Environmentally protected for use indoors and out, Curtis alarms can operate in temperatures ranging from -40 to +77°C