Alarm systems can cost thousands of dollars and up to $100 per month to monitor. This simple doorstop alarm will cause intruders to run the opposite direction with its ear-shattering high-decibel alarm. Your neighbors will surely hear the alarm and notify the authorities to the vandals' activities. Meanwhile, you'll be enjoying the vacation you took with all the money you saved on an expensive alarm system. Don't wait to buy; this $5 item could save you thousands!