Signs using the Guru 3.0 software will use one of two controllers.
CPower3200 is used for TriColor or Single Color Signs.
CPower5200 is used for Full Color signs.
The current software version is Guru3.1.
The Guru signs use the Saturn Wireless System for communications, unless the sign is an indoor unit.
Indoor signs use a single router. Should any problems occur with an indoor sign, the appropriate action would be to contact technical support directly.