Jakcom R3 smart ring  Wearable electronic components, it can connect IC / ID / NFC Card Reader like doorlock or cellphone to Unlock,PayShare information or Operate some mobile function ; Original Health Module can improve human performance effectively. The product shape is designed according to the international popular elements, created by the pure medical titanium, no need to charge, high waterproof, and suitable for any people at any time. Features :Type: NFC Smart RingMaterial: Liquid TungstenGender: Women, MenColor: White, BlackSize(US): 7, 8, 9, 10, 11, 12Weight: About 28gFunctionsR3:1.Replace "door key" ,"Payment Card" or other"IC"/"ID"card; 2.Improve human health and prevent disease; 3.Unlock phone ,Quick start phone's program,Share informations,Private notebook,etc; 4.No need to charge and waterproof;5.Full U.S. sizes optional;6.Made by Liquid Tungsten and Epoxy Crystal Ceramic,Fashionable design elements.R3F:1.Improve human health and prevent disease; 2.Unlock phone ,Quick start phone's program,Share informations,Private notebook,etc; ( NFC chip embedded in the ring)3.No need to charge and waterproof;4.Full U.S. sizes optional;5.Made by Titanium Alloy, 18K Rose Gold and Epoxy Crystal Ceramic,Fashionable design elements.Package Content:1 X Jakcom R3 NFC Smart RingNotice:1.Cannot connect with IPhone, and the battery of NFC Smart phone must be original;2.Please allow slight deviation for the measurement data.