JAKCOM Smart Ring new product of Smart Devices match for smartwatch stratos matrixblaze v3 smartwatch smart watch for kids with gps

R4 is a multifunctional RFID finger ring,The builtin IC and ID modules can take the place of Access card, Parking card, Membership card, Shopping card and other RFID cards;The builtin NFC module can realize Virtual call, Scene notification, Business card sharing, Memo sharing and other featured cloud services.