Federal Signal's Model SLM700 is a multifunctional electronic sounder developed with a multiple input technology that is capable of producing two different tones controllable via independent electric contacts. Model SLM700 offers a high acoustic performance through 2 channels offering 64 tones, 32 tones per input selectable via dip switch. Both channels offer a powerful electronic tone adjustable from 65dBa up to 105 dBa at 1 meter. Model SLM700 body material is a self extinguishing polycarbonate material with high impact and UV resistance suitable for outdoor applications. To complete your signal, a Federal Signal StreamLine Modular Base SLMBD, SLMBP, SLMBS, SLMBT or SLMBW is required.