15 foot long Sensor Bar Extension Cable for Nintendo Wii
From CheapThrillsGaming

Cheap Thrills Games offers this high quality cable for the Nintendo Wii. Its much cheaper than using battery powered sensor bars. This cable comes with the Cheap Thrills Cable Guarantee - as long as it is purchased from an authorized reseller.
Amazon Sales Rank: #2571 in Video Games Brand: Cheap Thrills Gaming Model: CTG0003 Platform: Nintendo Wii

Sensor Bar Extension Wire We have a wall mounted TV and a in wall component rack that is about 15 feet away. We put te Wii in the cabinet, but could never get the wireless sensor bars to work very accurately. So, we bought this extension cable, ran the wire through the wall with the other TV wires and use the sensor bar that came with the Wii. With the 6 or so feet of the wire already attached to the sensor bar, we had plenty with this extra 15 feet to make the route to the wall cabinet. I am not sure why, but it simply works 10X better than the 3 wireless bars we waisted money on. I, and the kids, are VERY HAPPY with this product! Nice when you want to save your money on batteries I put two of these together to get 30 feet of extension, and it works very well. I had the Nyko wireless bar and the timer feature was cute, but this is much better. I want to forget about my sensor bar and not have to change batteries. And with Amazon Prime, 2 of these was actually cheaper than one of the battery powered bars. Very happy with it. great item, simple yet very useful This item worked great. I needed to be able to mount the sensor bar under the plasma tv and run the wiring through the wall so it was concealed. This item worked great for that application. I didn't want to deal with replacing batteries in a wireless sensor bar, so this seemed like the logical choice. I'm very happy with it.