Darkmother, wanna order a couple of these and split the shipping?
http://www.bikepartsusa.com/product_...=1&p=01-170019
($9USD S&H for one, $10.50 S&H for two or three, and then it goes up by one USD each extra 2 units)
It is 105db, small, easy to mount, thumb switch, takes regular batteries
Airzound is apparently 115db, but way bigger and more of a pain to mount.
PS. What a ******!
http://www.youtube.com/watch?v=2_6UqV5oeR8