Our review:Item Description:TERK SIR-EXT50 indoor/outdoor extension kit is designed for use with single input SIRIUS receivers. It provides an additional 50' of antenna cable for SIRIUS antennas and features weather resistant design. Built-in amplifier eliminates signal loss.
Amazon.com Item Description:With the Terk SIR-EXT50 Indoor/Outdoor Extension Kit, you can install a single-input Sirius radio tuner in your home, extra-large vehicle, boat or any other location where the cable that came with your Sirius antenna isn't long enough for the job. The SIR-EXT50 features a 50-foot extension cable for both indoor and outdoor applications. And a built-in amplifier eliminates antenna signal loss to ensure reliable reception.
Note: The Sirius antenna is not included with the extension cable. This extension cable is only compatible with a single-input Sirius tuner.
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Buyer Testimonials
Average Buyer's Review:
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Good Value
This is a great solution when your satellite radio cannot be located within the 25 feet that comes with the regular antenna. this allows up to an additional 50 feet for a total of 75 feet to locate your radio making it a lot easier to place the radio where you want it.
Buyer's review: 
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Flawless!
This extension kit for my Sirius Radio was easy to install and worked flawlessly. Recommend it highly.
Buyer's review: -
Sirius Extension Kiy
The extension cable was exactly what I was looking for. I hooked up the Sirius antenna with the cable that came with the unit, but it was way too short to extend on my roof. I have an adjacent building at five stories and was blocking the signal. The extension kit seems to be a higher-quality cable than what came with the original Sirius antenna. Very satisfied.
Buyer's review: -
Works Great
Does exactly what it's supposed to do. If you guy a Terk Outdoor SAT radio antenna for your house, get this extension kit. You'll need it if you're doing any type of professional looking hidden install.
Buyer's review: -
Works, No Trouble
I had zero connectivity prior to installing this antenna, now I have excellent reception. It runs from the stereo into the cold air return, through the crawl space, out a vent in the foundation, up the downspout, up to the peak of my roof. I did hide the connection under the eave and have had no trouble with it. I attached it to my ridge vent with liquid nail.