This treadle is the first electric treadle for a portable tapestry loom. You can easily change the shed (for tapestry weaving primarily) by pressing down on a pedal that will electronically change the shed without having to use your hands. Easy, fast and perfect for tapestry weaving!
You can download instructions, troubleshooting information and safety warnings for the power treadle here. See a video on how to install the treadle here. A video comparing the electric treadle to weaving without one can be found here
I thought this was a little difficult to put on my loom because I have bad hands. I finally gave up on the rubber tube and all is great. I'm a new tapestry weaver so I have not used it much. I love gadgets so I am glad I bought it.