Colors: Transparent on one side, black on the other. Warning: If you can't wrestle bears this ring is not for you. This is a large ring with a larger antenna suitable for phones that struggle with small NFC Tags(such as the Galaxy Note 3).
NFC Smart Ring
NFC Smart Ring
2018 St. Louis Rams(Los Angeles Rams) NFC Championship Ring - Premium – Foxfans Ring Shop
KeyDuino - The quick & easy way to build NFC enabled things by Pierre Charlier — Kickstarter
Wearables - Dangerous Things
NFC Smart Ring - Warren Rings
NFC Ring® (@NfcRing) / X
Stainless Steel Wearable Ring with Built-in NFC chip for iPhone, Android or Windows
NFC Smart Ring
NFC Ring review - The Gadgeteer
かざすだけでロック解除も自由自在!多機能ハイテクリング「NFC Ring」