The DEI 477T "Two-Way" Remote is a replacement remote for the DEI Hornet 554T and the DEI Valet 554R "Two-Way" Remote Starter Systems.
The DEI 478 P/V/X and the DEI 479 P/V/X Responder remotes do not work with the DEI Hornet 554T and the DEI Valet 554R "Two-Way" Remote Starter Systems, they work only with the DEI Python, Viper and Clifford "Two-Way" Responder Systems only.
Also, the DEI 474T "One-Way" replacement remote is available as an additional "spare remote" for DEI Hornet 554T and the DEI Valet 554R Alarm and Remote Starter Systems.
