The one I ordered has 2 sounds to select from, I bought it through email with Law Rocky (
[email protected]), same guy I ordered the truck kit from. It hasn't arrived yet but he sent me a link to a video of the thing here:
http://www.tudou.com/programs/view/-yxW751TKb8/ it sounds very similar to this sound unit here also:
http://www.youtube.com/watch?v=JGv3cyukL-w