The 200 Class 70mm Stacklight is a versatile signaling device that may contain up to five light modules, or four light modules and one sounder module in a single, integrated stack. The lens modules are available with LED, Incandescent or Xenon strobe light sources, and in red, amber, blue, green, yellow and white. Options for Steady Burn, Flash or Multi-Mode are available. The lenses are made from a self-extinguishing polycarbonate material and are scratch and impact resistant. Optional piezoelectric and magnetodynamic sounder modules complement the visual signals of the Stacklight, offering several audible tones depending on the model chosen.