They come in different shapes and sizes and identify threats by detecting metallic items. These devices come with features that allow the system to be further upgraded. If you’d like to have a professional set it up for you or want your system to be hard wired, there are companies that offer services along with customer support. Finally, you could also opt for third party monitoring services, remote access via Internet/SMS, and home automation if offered in the package. It doesn’t matter if this is your first time installing your home security system or you’ve done it countless times, going through the instruction manual is a ‘no brainer’. They are included for a reason and they should be followed if you want everything to run smoothly. The wireless home security systems of 20 years ago were notoriously unreliable. They produced so many false alarms that many homeowners stopped using them. That’s all changed. Today you can buy DIY home security systems that have professional grade wireless security equipment that’s extremely reliable, easy to install and affordable. Basic DIY home security systems start at about $225 and top out at $800 or so.