①. 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. ②. Specifications ③. 1. Jakcom R4 is entirely made of micro-crystal Zr ceramics, calmly deal with all kinds of scratches. ④. 2. Jakcom R4 carries with multiple sets of RFID chip modules, capable of simulating 4 contactless RFID cards. ⑤. 3. 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. ⑥. RF distance: 1 ~ 3cm ⑦. IC module type: UID ⑧. ID module type: T5577 ⑨. NFC module type: Ntag213 ⑩. Ring material: Ceramics ⑪. Standard US size #8 (57.1mm), #9 (60mm), #10 (62.8mm), #11 (66mm), #12 (70mm) ⑫. Package list contain: ⑬. 1 x Smart Ring ⑭. 1 x Manual