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. wireless technology works just like the human voice. When speaking to someone you automatically know to turn towards them and your voice is projected in that direction and therefore louder to the recipient than if you were to talk facing away. These tinfoil antenna's allow you to face your wireless devices towards each other, so when they talk they can hear each other better. The tinfoil also blocks out some interference from other equipment behind the tinfoil, such as electrical boxes and other wireless devices, much like putting up cubicles at work to keep noise levels down, that way you don't have to scream at the guy next to you hold a simple conversation.