Home security starter kits make it easy and affordable to get a system up and running in your home. But they are just that — starters. To make everything work best for your home, you need to personalize it.After more than five years of testing DIY home security systems, I’ve come to realize the value of a few add-ons that, depending on your particular needs, can make using a security system more convenient and also comprehensive. One of the things we’ve always liked about the Ring Alarm and Ring Alarm Pro is how many add-ons and accessories they can work with. I’ve tested a lot of those compatible components, and here are the seven that provide the most important features, integrate particularly well, and simply make this home security system even better.