Honda-engineered security system with S2000's unique, factory-installed immobilizer system provides the ultimate in theft deterrence Remote-control operation allows convenient locking and unlocking of vehicle, as well as arming and disarming of the security system. Panic button for emergencies included. Door-ajar warning: If any door or trunk is not closed properly, horn will sound three times and the system will not arm Auto-relock function automatically relocks any door that has been unlocked within 30 seconds when no doors have been opened Power-interrupt protection: If system is armed and then battery is disconnected, system will be armed when power is restored ********************MUST have Security Attachment for Installation*******************