Most Qi chargers only work with an external pad or stand that your device has to come into contact with, the Invisacharge® uses our Invisacook technology to provide you with easy charging capability by working from beneath your counter space. Additionally, while many Qi charging items will only work through materials that are thinner than one centimeter, the Invisacharge® is installed under any solid surface material up to five centimeters and does not need any additional pads or devices to facilitate charging. (Unless when attaching to particle board or other similar artificial materials)