A wide selection of audible alarms is being introduced for use as warning devices on equipment and instrumentation. Rectangular-shaped Series 02 and 03 buzzers operate at 10 to 220 vac or 10 to 110 vdc and feature continuous or intermittent operation and an adjustable sound level through use of an external resistor. Series 04/14 buzzers are sealed to IP 65 and operate at 24 vdc, while Series 31 devices require a 10 to 75 vac/vdc supply and can be wired for adjustable-volume, continuous, or intermittent operation.