All this week we're testing out the infomercial products you've always wondered about.
If you've ever worried about anyone breaking into your home or your hotel room while you're sleeping, this one may be for you.
The 'Doberman Security Door Alarm' says it will give you the extra peace of mind you need.
For $9.99 this portable alarm hangs on your doorknob and loudly alerts you if the door is opened.
We tried it out to see if it's really worth it.