Channel Plus NF-470 Notch Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Inserts Locally Generated Modulated Channels By Blocking Certain Channels</li><li>Allows User To Create New Channels</li><li>Blocks Catv 70–74 &amp; Uhf 19–23</li><li>Creates Catv 71–73 &amp; Uhf 20–22</li><li>Freq: 499.25 Mhz–523.25 Mhz</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41i5%2BikYtML.jpg" noproxy>