We are so Proud to Present the NEW WIRELESS, Tranqil-Ease® Mattress Massager™ so Easy to Use, Oh-So-Heavenly to Enjoy! Gentle Waves of massage melt away stress Full bed coverage, any size bed. Just slip the wands between mattress and box spring-and you're ready for a head to toe, full body massage Intuitive, easy to use, ergonomically designed control wand makes relaxing simple. Choose from a 16, 20, or 30-minute massage. Select from three massage types; Wave, Pulse, or Steady Full-range variable speed and intensity settings. Zone Buttons allow you to control your massage. An internal memory setting saves your last setting for convenience. Experience the feel of the new Sensate Control Low voltage system C/UL Listed. US & Foreign Patents Pending. 2 units recommended with split box, king or queen size beds.