Model SLM500 is a multifunctional LED beacon and sounder combination developed with a multiple-input technology that allows three separate levels of alarm, controllable via wiring selection. This unit offers multiple combinations, including independent visual signal, independent audible tone, or a combined audible tone and visual signal.SLM500 offers three flash patterns (3x strobe, fade, and steady) and the option of no visual effect. There are 64 unique tones to select from across two switches (32 tones per switch). The volume of the selected tone is adjustable between 86-105 dBA at 1 m at three output levels (high, medium, low) through an integrated button.Channel 1 includes a visual signal only. Channel 2 combines an audible tone from switch A to the chosen flash pattern. Channel 3 combines an audible tone from switch B to the chosen flash pattern. Channel 2 and 3 allow the option of audible tone only/no visual effect by cycling through the flash patterns using the integrated button until the visual effect turns off. The SLM500 enclosure is made from a self-extinguishing polycarbonate material with high impact and UV resistance.