Tap to share cards and signs are powered by cutting edge "NFC" technology. "Near Field Communication" is a short-range wireless technology that allows devices to communicate with each other when they are close together. We find the easiest comparable everyday example is the tap to pay feature at store checkouts and gas pumps, same magic, different applications. Is Near Field Communication safe? 100% absolutely yes! NFC cards and signs do not read or store data from someone's phone, they only transmit like mini broadcast antenna's sharing your contact details, social media profiles, business review pages, and other multimedia information. NFC technology products are innovative, exciting and most definitely here to stay. To connect with a live GruvCard NFC Near Field Communication technology expert call 561-221-2711 or email tap@gruvcard.com