specification:material: metalColor: blackRing size: 7#,8#,9#,10#,11#,12#,13#,14#Wireless distance: 1.5 cmWaterproof rating: IP68Shipping frequency: 13.56 MHZ, 125 KHZOperating temperature range: -50° to + 80°Product Description: Smart Ring is a stylish wearable electronic product that connects to a smartphone via Near Field Communication (NFC) for function execution and data sharing. Designed with high water level and waterproof, it can be used without any power supply. Embedded in the NFC chip, only connected to NFC-enabled smartphones.Detailed operation:Place the smart ring in the NFC area of the smartphone, perform: screen unlock, application lock unlock, application quick start, business card and URL information transmission and reading.size:7#:54.3 * 17.3 * 17.3 MM8#:56.8 * 18.1 * 18.1 MM9#:59.3 * 18.9 * 18.9 MM10#:62.2 * 18.9 * 18.9 MM11#:64.7 * 20.6 * 20.6 MM12#:67.2 * 21.4 * 21.4 MM13#:72.2*23*23MM14#:74.7*23.8*23.8MM
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