This a replacement or additional remote for your Viper system. View the System Compatibility chart below to see if this remote will work with your system.
CLIFFORD 7145X Super Code Hopping Replacement Remote for 3105X 
The new Clifford four-button remote offers DEI's exclusive Super Code Hopping™ protection against code grabbers, with 2/66 (18 quintillion) rolling codes. With Blue led.
Replacement Remote Control BRAND: Clifford Model: 7145X
Manufacturer: Directed Electronics (DEI)
7145X Clifford Replacement Remote