Turn a two-speed wand into a variable-speed wand with this variable-speed controller. Simply plug the box into the wall plug the wand into the box and adjust the dial according to your desires. You also get an extra 2.5 feet of cord for additional mobility. There is even a clip so you can attach it to your beltline for hands-free pleasure. Now you can go from low to high and enjoy everything in between. Measures 4.5 in. long 2.25 in. wide 1.75 in. high.