J5523518T1 is an FCC ID from the early 90s which was owned by Delta but used by many brands including ICD, TRC, Crimestopper (Gargoyle,) Black Widow, Magnum, Impulse, Harada and many more. As long as you choose a J5523518T1 remote with the same number of buttons, the same color LED light, and the same frequency, it will be able to be programmed to your system. J5523518T1 could be 304, 310, 311, or 433 MHz.
J5523518T1 = J5523518RT1
Remote comes with programming instructions and battery. Free tech support.