NFC Ring

The NFC Ring (CUID + T5577) is a sleek and compact wearable designed to bring seamless access and convenience to your finger. It operates across both high-frequency and low-frequency NFC/RFID systems, making it a versatile all-in-one digital key that works with a wide range of access technologies.

Its durable yet lightweight construction allows it to store and emulate multiple credentials used in daily life. It can function as your gym pass, office or building access key, house key, transportation card, digital fob, or digital portfolio, providing fast contactless authentication when placed near a compatible reader.

Designed for people who value efficiency and minimalism, the NFC Ring replaces bulky cards and keychains while remaining comfortable for everyday wear. Its wide compatibility makes it suitable for personal, professional, and public-transport environments.

Unlock your world effortlessly. The ring is your key.

The ring supports T5577 for low-frequency systems and Magic Gen2 CUID for high-frequency systems, covering both 125 kHz and 13.56 MHz technologies. It offers flexible UID configuration for HF systems, reliable emulation across modern and legacy infrastructures, and a durable form factor built for long-term daily use with smooth, consistent contactless performance.

Sizing Guide

The NFC Ring is available in 56 mm, 59 mm, 62 mm, and 65 mm inner-circumference sizes. To find the correct size, measure the circumference of the finger where you plan to wear the ring.

How to Measure

Wrap a strip of paper, string, or flexible tape around your finger and mark where the ends meet. Measure that length in millimeters, then choose the closest size: 56 mm for Small, 59 mm for Medium, 62 mm for Large, and 65 mm for Extra Large. For best accuracy, measure at the end of the day when your hands are at their normal size, and avoid measuring when your fingers are cold.