The 2504 controller exists as two different versions: One that controls Martin Roboscan 805s and another that controls Martin Roboscan 812s. Both versions control up to 8 Roboscans individually, and even more (up to 32 Roboscans) may be connected by allowing several Roboscans share the same control address. Please note that all Sequences and Shows are programmed for 4 or 8 Roboscans, and additional Roboscans on the same address will all perform in exactly the same way. The 2504 controller lets you choose between 40 preprogrammed Sequences, 5 Shows and a non-repeatable random Sequence. These can be triggered either manually, automatically or by music. It is also possible to enable a total blackout function manually.