Jakcom R4 Waterproof High-Speed NFC/ID/IC Card Input Smart Ring

Travel worry-free during your sports trip with our Jakcom R4 Smart Ring. Thanks to water-proof and stainless steel material, you can wear the ring in any environment. The smart ring makes life more efficient by automatically conducting mobile phone functions like unlocking RF devices and sharing various cloud information, e.g.,
encrypted text, business card, web pages or network disk files.  JAKCOM's development team continues to update special functions for the R4 Smart Ring and will auto update your device synchronously.