With the Trinity Wand Speed Controller, you can take your Hitachi Magic Wand, or vibrators of similar design and up the ante from 2 speeds to infinite speeds. When you connect the controller to your wand, you can use the dial to find that exact vibration level that you desire. Plus, with the 6 ft cord, you can enjoy more room to roam and place the vibrator wherever you wish. The var setting is for finding that exact level, while the full setting gives you maximum low, medium and high stages.