What it does is it organizes your cord into two seperate flexible chambers, one for each half.

This allows you to access either end independently, and at all times.

You can plug it in, go to work, and it unreels as you work.

It winds up easily, because the ends wind past, not over each other, so they don't tangle.

It works on anything flexible - extension cords, air hoses, flat cords, all the RV items like fresh water hose, antenna cables, and power cords.

The CP-100 and CP-XL units are made out of the same material as pickup truck bed liners. They are formulated for outdoor use - good to minus 100 degrees.