The Pertronic Industries Weatherproof Audio Visual Warning Sign provides reliable visual audible alerts as required by AS 4214 and ISO 14520 within an IP66-rated enclosure. The device also produces clear audible tones and voice messages. The Audio Visual Warning Sign uses the latest LED technology to provide high visibility and improved performance compared to other technologies. An on-board microcontroller provides an eight (8) stage selectable Backlight operating modes and a 90 second (maximum) Countdown Timer. An LED matrix is available as an option for visual indication of a countdown timer. The Visual Warning Sign supports 2, 3, or 4-wire standard connections. Configuration DIP Switches provide tone control for each of two stages.