That is just a MFJ-927 remote autotuner feeding your antenna wire. If the wire you use is long enough it will tune 160 meters. It won't tune a 43-foot wire on 160 meters, though you can add some external inductance to the autotuner if you can't use a longer wire. See the 160M extender in the "Articles" section of my website at
www.ad5x.com.
Phil - AD5X