We carry all the replacement remotes available for the following models of Directed Electronics ( DEI ) alarms / keyless entry / remote starters. Replacement for the following alarms: Viper 591XV, 690XV, 790XV and 791XV Security systems. Also compatible with the Python 880XP, 881XP, 680XP and 581XP or the Clifford Matrix RS III, RSX 3.5, 2.5X and RSX 1.5. We carry all the replacement remotes available for the following models of DEI Replacements Remotes: Viper, Hornet, Python, Sidewinder, Clifford , Avital, Prime, Automate, ezsdei, ezsde1, Your Valet, Equalizer, Pro Guard, Failsafe, Steal Stopper, Merlin, Hornet, Rattler, Viper Ultra, Vesco and Wasp Alarms.