Check the listing for details. EAGLE comtronics ESN-UU 120. Condition: New. Listed at 16.01 USD. Description: A negative filter is a passive device that removes a video signal from entering a non-subscribing cable customer's home. It is the most effective and economical method of pay television security in the world. The filter attenuates the video carrier of the specified channel to a point where there is no viewable picture on the television set. Negative filters are installed at the subscriber outlet of the distribution tap or within lock boxes for multiple dwelling units.Every product we manufacture is tested to the highest standard throughout production, so you consistently receive the best quality filter available in the industry.AS New and Used Items: -All Items listed as new and used are eligible for returns within 30 days-Items must be unused(upon receiving item) and in the same condition it was received-All returns must be in original packaging -Customer is responsible for cost of shipping *Items Listed As "For Parts/Not Working" Are Untested And May Work* *Any Items Sold "For Parts/Not Working" or "AS IS" Not Eligible For Returns*