JAKCOM R4 is a multifunctional RFID finger ring, The built-in IC and ID modules can take the place of Access card, Parking card, Membership card, Shopping card and other RFID cards; The built-in NFC module can realize Virtual call, Scene notification, Business card sharing, Memo sharing and other featured cloud services. Specifications 1.Jakcom R4 is entirely made of micro-crystal Zr ceramics,calmly deal with all kinds of scratches. 2.Jakcom R4 carries with multiple sets of RFID chip modules.capable of simulating 4 contactless RFID cards. 3.Jakcom R4 is capable of operating different functions Or sharing different incomptiable withmation on Android and IOS platcomptiable withms Through two sets of NFC modules, e.g. Virtual call(Quickly trigger a real timed call) Scene notification(Quickly trigger multiple preset notifications) Memo sharing Business card sharing ect. RF distance:1 ~ 3cm IC module type: UID ID module type: T5577 NFC module type: Ntag213 Ring material: Ceramics Standard US size 8(57.1mm), 9(60mm), 10(62.8mm), 11(66mm), 12(70mm) Package list contain: 1 x Smart Ring 1 x Manual About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks comptiable with your cooperation and we'll make you feel satisfied.