{"product_id":"2805-rfid-nfc-smart-ring-size-11-ntag213","title":"RFID \/ NFC Smart Ring - Size 11 - NTAG213","description":"\u003cp\u003eWhat did Lord Sauron, when forging the One Ring in the fires of Mount Doom forget to include in his all powerful ring? What did he forget to leave out of the ring impervious even to dragon fire, designed to rule over all free peoples of Middle Earth in perpetuity - a ring destined to be the One Ring to Rule Them All, to tempt its wearer with the promise of infinite power? Thats easy - it could have used an embedded RFID\/NFC transponder!\u003c\/p\u003e\u003cp\u003eNFC (near field communication) technology is a great way to interact wirelessly with projects. With the \u003cstrong\u003eRFID\/NFC Smart Ring\u003c\/strong\u003e your ring can communicate with your smart phone\/tablet, computer, or much more! \u003cstrong\u003eContains two MiFare Ultralight C - NTAG 213's \u003c\/strong\u003ewith 144 bytes of read\/write memory. One is on the 'inside' of the ring towards the palm, the other is underneath the jewel. You can use tags to launch apps, unlock your phone, transmit a URL, control an Arduino, etc.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThis is RFID\/RFID Smart Ring with an 21mm Inner Diameter.\u003c\/strong\u003e \u003ca href=\"\/\/www.adafruit.com\/?q=nfc%20smart%20ring\u0026amp;\"\u003eWe have a bunch of sizes in the store!\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eNFC is a way for two devices very close to each other to communicate. Sort of like a very short range bluetooth that doesn't require authentication. It is an extension of RFID, so anything you can do with RFID you can do with NFC. Because it can read and write tags, you can always just use this for RFID-tag projects. This ring can be read by any NFC\/RFID reader with ISO 14443-3A MiFare Ultralight\/NTAG support (which is pretty much all of them), including our PN532 readers and various tablets and phones.\u003c\/p\u003e\u003cp\u003eLearn more about RFID \/ NFC products and projects on the \u003ca href=\"http:\/\/learn.adafruit.com\/category\/rfid-slash-nfc\"\u003eAdafruit Learning System\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cimg alt=\"\/\/www.youtube.com\/embed\/EPlYtDCtePM\n?start=915\" src=\"https:\/\/img.youtube.com\/vi\/EPlYtDCtePM\/hqdefault.jpg\" class=\"video-insert\"\u003e\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"4-6 Giorni","offer_id":47700429930841,"sku":"ADA-2805\/B","price":65.81,"currency_code":"EUR","in_stock":false},{"title":"1 Giorno","offer_id":47886552924505,"sku":"ADA-2805\/A","price":65.81,"currency_code":"EUR","in_stock":false},{"title":"2-4 Settimane","offer_id":47886718042457,"sku":"ADA-2805","price":65.81,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/2805-01.jpg?v=1705519572","url":"https:\/\/robot-italy.com\/products\/2805-rfid-nfc-smart-ring-size-11-ntag213","provider":"Robot Italy","version":"1.0","type":"link"}