Every RC4Magic device can be configured to use the Public ID, numeric code 999, which is the same on every RC4Magic system ever made.  Using the Public ID is the only way to use devices from different systems together.  No other wireless DMX system from any manufacturer provides the level of system security provided by RC4Magic private and unique System IDs — even with other RC4 users operating systems in the very same room, functional interference between systems is impossible when they are using one of their three private system IDs.