riversmerge RFID Rewritable Dual Frequency in One ID T5577&IC CUID Black Ceramics Smart Finger Ring Wear for Men or Women (Black-20mm)

1.There are 2 chips in the ring, one is ID T5577, another one is IC CUID. . 2.ID T5577 chip is blank, it can not be used without written or copy. . 3.IC CUID chip is pre-programmed, you can directly authorize it to work if you are administrator. You can also use it to copy your old IC card. If you have android NFC phone, you can copy your old card IC card without a copier. . 4.Both ID and IC use 360-degree omni-directional sensing technology, the sensing effect is much higher than similar products in the market. . 5.Our ring is made of zirconia ceramic material, which is very comfortable to wear. . This dual frequency smart ring contains two chips, 125kHz and 13.56mHz. If you need to write instructions to both chips simultaneously, please find the corresponding chip points and you can directly write them. Then perform a substitution function.. Please be advised that if you are unable to write to the frequency, please try several times. Due to the fact that two different chips have frequencies that revolve around the inside of the smart ring, there may be obstacles. You can find the corresponding point for reading and writing