If your business has been a victim of theft it could possibly mean your back door alarm system was not set up correctly if you were robbed through the back door. Door alarms prevent unauthorized entry or exits. Whether you are in health care, education or in a government building you will most likely see doors with these units installed. The difference between hardwired and wireless security is that alarm systems typically require a landline connection, as wireless systems don’t need a landline connection, wireless door alarms can be easily transported through a wireless connection that you can monitor through something like an app. Standalone door systems ping a chime each time the door is opened to that you are immediately notified.