Feature:1. Smart Ring: Adopts the fourth generation radio frequency identification technology and for Ntag215 IC chip, supports for ISO1443A/B standard protocols, and has a transmissing rate of 106k bit/s.2. Applicable Scenarios: This smart ring is suitable for municipal card swiping, access control, attendance, electric vehicle keys, NFC electronic business cards, BT or WiFi pairing, and other scenes.3. Polishing Finish: With mirror polishing technology, this smart ring has a glossy appearance, ensuring comfortable wearing without the need for battery or power supply, making it fashionable and elegant in daily wear.4. Ceramic Material: This smart ring is made of excellent ceramic material, with strong falling proof and wear proof, mild touch, and delicate texture. The compact and lightweight design makes it easy to wear.5. High Performance: This access control ring has excellent toughness and temperature proof, with IP68 water and dust proof, suitable for various harsh environments, you can use it with confidence.Specification:Item Type: Smart RingMaterial: CeramicIC Chip: For Ntag215Transmissing Rate: 106k bit/sChip Frequency: 13.56mHz (IC Chip)Induction Distance: Desktop Reader, distance of more than 3CMErase Write Times: For EEPROM data read times greater than 10W timesRing Size: No.10, Ring Circumference: Approx. 65mm / 2.56in, Inner Diameter: Approx. 19.8mm / 0.78in.Package List:1 x Smart Ring