Here are 3 things you need to know about this Whelen HHS3200 Hand Held Programmable Siren: 1. It’s got 37 available tones, including Wail, Yelp, Airhorn, and Manual Siren. 2. It hooks up to Windows-based programming for full customization and configuration of all functions. 3. It’s been carefully designed to withstand tough conditions and offers an intuitive and efficient interface. We love it, so we know you’ll love it. Give us a call or check out Sirennet.wordpress.com for more features and sp