PA / SIREN / SOUND EFFECTS
This little device is great. For $25 from JCWhitney you can get all three of these things rolled into one little black box easily mounted anywhere. Check it out more here.
That page says its $50 but their newer catalogs sell it for $25 since the came out with a newer model with a few more sounds and digital setup. The new one is about $45 I think and has 45 sounds or something. Its good for hours of entertainment on the road. I once pulled over a speeding motorist using the police siren and made him pay me on the spot. So it actually made me money!*
* - denotes sarcasm
