We have an excellent repro Hand Crank Air Raid Siren for sale. We've seen this kind of Warning Sirens before in old movies and war films. The siren has a stand and you can crank up the noise (wail) that can be heard up to 1/2 mile away! Since it is hand-cranked siren, there is no power source needed. If you need someone's attention up to 1/2 mile away, this is a great tool to have! It's also great for WWII Reenacting, movie production and simply pranking.
Please view the Hand Crank Air Raid Siren pictures on the left and the youtube clip on this page. You will notice that you can turn the fan cover ON or OFF. The default position is COVER ON. You should try cranking the air raid siren with the fan cover on to see if it is loud enough and then slowly crank up speed and turn the handle to OFF. Some people may even need ear plugs!