RPN: 7941V Remote Compatibility: System Model Number System Part Number Date Code If you see "All" in the Date Code column then the remote will work with any versions of the corresponding system. Most newer systems have the "All" designation. If you see a value (such as 8D-9A), then the remote will only work with a subset of the system produced during a certain time period. This is only the case for some older systems. If you have one of these older systems, here is how to find the date code: 5904 5904V All 5902 5902V All 5501 4702V All 5901 5702V All 4704 4704V All 5704 5704V All