&lt;p&gt;CS-304&lt;br /&gt;&lt;br /&gt;&amp;bull; Constant directivity horn improves directivity characteristics and ensures uniform and clear sound dispersion. &lt;br /&gt;&amp;bull; Lightweight ABS resin enclosure that is mechanically strong and resistant to impact. &lt;br /&gt;&amp;bull; Weatherproof polyurethane resin paint permits the speaker to stand up to many years of outdoor installation. &lt;br /&gt;&amp;bull; Stainless steel hardware protects the speaker from corrosion. &lt;br /&gt;&amp;bull; The enclosure complies with IP-64 Standards for dust proof and waterproof characteristics. &lt;br /&gt;&amp;bull; Rotary impedance selector switch facilitates external changes in impedance during and after speaker installation.&lt;/p&gt;&lt;table class=features&gt;&lt;thead&gt;&lt;tr&gt;&lt;th colspan=2&gt;Features&lt;/th&gt;&lt;/tr&gt;&lt;/thead&gt;&lt;tbody&gt;&lt;tr&gt;&lt;td class=feature&gt;Type&lt;/td&gt;&lt;td&gt;Horn  &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Single/ Pair&lt;/td&gt;&lt;td&gt;Single  &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Outdoor horn&lt;/td&gt;&lt;td&gt;Yes  &lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;