Northbrook, IL: April 2011 -- AmpliVox Sound Systems, Inc. announced today that it will upgrade its popular “Half-Mile Hailer” line of portable PA systems with a red siren alert button. The Hailer is a favorite choice for law enforcement, school administrators, and others who require sound systems for crowd control and emergency preparedness. Adding a siren to the Hailer enhances the ability of officials to issue emergency warnings and crowd control alerts. According to AmpliVox CEO Don Roth, “Emergency management requires flexibility and efficiency. When officials need to get people’s attention and give them instructions, the Hailer with the new siren button feature is an all-in-one solution.” The siren comes with an easy-to-use “red button” control. Other features of the Hailer include a 50-watt amplifier, a tapered horn speaker, and wireless microphones that enable the user to see and be seen unlike traditional megaphones. The Hailer family is great for use in high noise areas and large open spaces. Its “Football Field Sound Range” is effective for crowd control, public safety, law enforcement, athletic events, band practice, field days, outdoor marketing events, auctions, and political campaigns. The Half-Mile Hailer series also helps schools meet the security requirements of the No Child Left Behind Act, which mandates schools to offer secure, safe learning environments for their students. For more information about the Half-Mile Hailer line of products, visit http://www.ampli.com. About AmpliVox AmpliVox ® Sound Systems products are made in the USA (with only a few exceptions), meet stringent UL standards, and come with an up to 6-year warranty. Our wide selection meets every speaker's sound coverage and style needs. Whether you are in a small meeting room of 30 people or a large 20,000 square foot auditorium of up to 10,000 people, AmpliVox ® Sound Systems' extensive range of superior quality, simple to operate and reliable electronics will provide maximum satisfaction and ensure a crystal clear message.