Martin ZR 31 is a high-power smoke generator designed for professional use in the entertainment industry. It features a 2500-watt heater, a 5-liter fluid capacity, and a variety of control options, including remote control, DMX, and 0-10V input. The ZR 31 is capable of producing a dense, even fog output that can be used to create a variety of effects, from subtle haze to thick fog. It is also equipped with a built-in timer and a fog density control knob, allowing for precise control over the output.