M4K Classic 4K 13.56 mHz RFID Smart Ring,Not Changeable 7Byte UID ISO14443A Access Control Card,Men and Women Smart Accessories

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【 Original Chip 】 Adopting the M4K Classic 4K chip with an original frequency of 13.56mHz, all rings are pre programmed with a unique ID (7-byte UID).

【 Ring Material 】 The ring shell is made of zirconia as the raw material, and we use pure manual grinding, polishing, and chamfering processes to make the surface of this ring smooth and less likely to leave fingerprints. Visually and tactilely, it does not appear too bulky or thick. You can take it for a shower nd wash your hands.

【Ring Size】The ring size is determined by American standards: 6 #, 7 #, 8 #, 9 #, 10 #, 11 #, 12 #. Give you more choices and don't worry about not having a ring that fits your size.

【Compatibility】This ring is compatible with smart lock devices such as KABA, SAFLOK, MIWA, and ONITY LOCKS. It is also compatible with RC522 and PN532 card readers.

【 Product Advantages 】The ring made of zirconia all ceramic will not be damaged even when dropped at a height of 1 meter. It is waterproof, not easy to stick dust, and can be wiped clean with a clean cloth. You can wear it for outdoor activities such as running, swimming, etc.

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⭐ Notes ⭐

⚫ If you don't know which ring size to choose, it is recommended to measure it at night. And measure the finger multiple times to obtain the maximum value.

⚫ Although this ring is marked with waterproof and anti drop features, try not to let it soak in water for a long time and avoid frequent bumps.

⭐ Product Parameters ⭐

Product Name M4K S70 Ceramic Ring

【 Chip 】 Genuine M4K S70 7Byte

【 Frequency 】 13.56mHz

【 Material 】 Zirconia

[Color] Black

【 Size 】 US Size 6 #, 7 #, 8 #, 9 #, 10 #, 11 #, 12#

[Function] This ring is compatible with smart lock devices such as KABA, SAFLOK, MIWA, and ONITY LOCKS. It is also compatible with RC522 and PN532 card readers.  

【 Erasable times 】>100000 times

[Data retention time] 10 years