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 @ 1m at three output levels (high, medium, low) through an integrated button. Channel 1 includes a visual signal only (default 3x strobe). 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. Compatible with 12-24 Vac/dc or 120-240 Vac* PLC compatible with PNP or NPN connections (Except Dock Base, only NPN) 3 Channels included 1: Visual signal only 2: Visual signal + tone 1 3: Visual signal + tone 2 The option to have independent audible tone 100,000-hour LED Five LED lamp/lens colors: Amber, Blue, Clear, Green and Red Three flash patterns: 3x strobe (default), fade, and steady 64 tone options at three adjustable levels Seven mounting base options Type 3R, IP65 enclosure CE Certified UL and cUL Listed * Voltage is dependent on selected base (sold separately)