It works! I finally tested an idea I read about several months ago. It all started when I read THIS on EMRR. I was looking for a Cheap and Easy way to find my midpower rockets. This idea works great. Here is the link to the Radio Shack Personal Alarm. Click on the “find it near you” link on the right of the page to check inventory at your local Radio Shack— the product has been discontinued so it is becoming rare. Don’t worry though folks are finding alternatives at dollar stores all over the country.
update: new link for these