For laptops, tablets, and routers, BioVibes has developed a chip of a unique stone that you stick on the bottom of your laptop and tablet or top of your router. Stick the chip ideally in the center on the Bottom Shell that you would have purchased with us. The chip has an action on the emitting and receiving radiations of about 38 cm radius around your device. This chip can fit all models of laptops and computers. If can not install at the bottom of your laptop just install at the bottom of your back screen. * Fits perfectly iPads and other tablets as well.