A. 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. B. Specifications C. Jakcom R4 is entirely made of micro-crystal Zr ceramics, calmly deal with all kinds of scratches. D. Jakcom R4 carries with multiple sets of RFID chip modules, capable of simulating 4 contactless RFID cards. E. Jakcom R4 is capable of operating different functions or sharing different information on Android and IOS platforms 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, etc. F. RF distance: 1 ~ 3cm G. IC module type: UID H. ID module type: T5577 I. NFC module type: Ntag213 J. Ring material: Ceramics K. Standard US size #8 (57.1mm), #9 (60mm), #10 (62.8mm), #11 (66mm), #12 (70mm) L. Package list contain: 1 x Smart Ring, 1 x Manual