The Windstorm Whistle is smaller and fits well where space is at a premium.
Posted by Gear Jammer on 19th Feb 2010
Do not just blow on this whistle without plugging your ears. It will damage your hearing. You may not hear the response to your signal if your ears are ringing. Plug your ears with your fingers while you blow on it then remove your fingers to listen for a response. I do recommend buying it.