RFID Rewritable Ring RFID Dual Frequency Ring Black US#10 RFID Ring, 13.56MHz CUID&125KHz T5577 Access Key Cards in One Ring, Ceramic Smart Finger Ring Wear for Men or Women

Dual Chips Design: The RFID rewritable ring is built with both ID T5577 and IC Cuid (the T5577 chip is located where the ring size is, and the Cuid chip is on the opposite side of the ring size), so you can use it to replicate most commonly used cards easily. Wear the smart ring and never worry about forgetting to bring your keys.
Multiple Sizes: The sizes are determined according to
American standards: US#6, #7, #8, #9, #10, #11, #12, #13. This allows you to have more choices to fit your fingers.
(Notice: Please check how to measure the size of your fingers before purchasing) Sturdy
Key Ring: The smart finger ring is made of zirconia all ceramic craft, which will not be damaged even when dropped onto the floor. It is waterproof and fashionable. You can wear it for outdoor activities such as running, swimming, etc.
Widely Used: The smart rings are easy to use, simply touch the ring to the reader for instant access. Its elegant gloss and lightweight properties make it an ideal choice for daily wear, perfect for offices, homes, schools, and more.
To Be Noticed: The rfid ring is blank, it cannot be used without being written or copied. Please make sure you have a corresponding RFID reader writer to clone data before purchasing