NFC is a technology allowing short-range data transfer between devices. This transaction can be achieved up to about 3 inches between each piece of equipment. Having a phone with a case can slightly shorten this distance. All of our products have this technology as do the majority of smartphones. This allows the data from your contact details within your Tap Tag to transfer to a smartphone from only a few inches away. This is a low-energy, speedy transfer and can be done infinite times.