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Why Invest in a Van Security System? The right van security system will make your life easier in the van and safeguard your belongings. There are a range of different security systems to choose from, ranging from basic alarms to expensive sensors and cameras. There are many retrofit alarms that can be put on doors, windows or even the entire vehicle. These alarms are typically activated by motion sensing and emit with a loud sound whenever they detect movement. Door locks If you're driving your vehicle for work or leisure security is an essent