如DIY, 可google一下。
http://www.audiosavings.com/products/Car-Alarms/Crimestopper-CS-883OEM-Upgrades-OEM-Factory-Keyless-Entry-System-To-Alarm-System/CS883+OEM.aspx
http://www.amazon.com/Audiovox-PRO9233N-Security-Upgrade-Factory/dp/B00401M39G