The Sound Sentry XL Alarm will replay your custom recording whenever it detects motion nearby. The possibilities are endless are they not, peeps? Herds of penguins, the Vienna Boy’s Choir, Obama Girl. Enough to scare away the nastiest villain. $24.98.
Sound sentry plays your custom recording when it detects motion up to 10 feet away! Use as an entry alarm, message reminders for family (hard to ignore!), sound effects for practical jokes, parties, etc. Thousands of uses! Uses 3 AAA batteries
The Sound Sentry XL actually works. Good idea that has a lot of uses, really is much cheaper than an alarm, a lot of alarms are $60+ and this thing is just $20. Also it doesn't need any installation just place it anywhere.