DMXcat Multi Function Test Tool with 5-Pin XLR CableCity Theatricals DMXcat system is designed for use by the lighting professional who is involved with the planning, installation, operation, or maintenance of theatrical and studio lighting equipment. The system consists of a small hardware interface device and a suite of mobile applications. Together, they combine to bring DMX RDM control plus several other functionalities to the users smartphone for use wherever and whenever they are needed.