SparkMarks High-Capacity NFC Adhesive Tags (5x Durable, Water-proof NFC Tags, with Topaz 512) First-time User friendly! These tags are pre-coded to make it easy for first-time users. Just turn on your phone's NFC and hover over the tags. Works with ALL NFC-enabled smartphones. Includes an easy-to-follow instruction manual. Includes 5x SparkMarks NFC Tags made of Durable, Water-proof PVC plastic with adhesive backing. Each Durable SparkMarks NFC Tag is 1.4 x 1.4 inches and 1mm thick, and has 480 bytes of memory. (NFC Forum Type 1 tag with Topaz 512 IC)