RFID Rewritable Ring Dual Frequency Black, US#12 | Ceramic Smart Finger Ring, 125KHz T5577&13.56MHz CUID Ring, One Ring Clone Access Key Cards, Wear for Men or Women

Dual Chips Design: The RFID rewritable ring is built in both ID T5577 and IC Cuid (T5577 chip is on where the ring size is, Cuid chip is on the opposite side of the ring size), you can use it to copy most commonly used cards easily. Wear the smart ring and never worry about forgetting to bring your keys.
Durable Key Ring: The smart finger ring is made of zirconia all ceramic craft, that will not be damaged even dropped onto the floor. It is waterproof and stylish. You can wear it for outdoor activities such as running, swimming, etc.
Multiple Sizes: The sizes determined according to
American standards: US#6, #7, #8, #9, #10, #11, #12, #13. Allowing you to have more choices to fit your fingers.
(Notice: Please check how to measure the size of your fingers before purchasing)
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 Notice: 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