Efanr R3 Smart Ring, Waterproof Dust-proof Fall-proof Wearable Magic App Enabled Rings for NFC Enabled Mobile Cell Phones Android Smartphones (Size 10)

Size:Size 10 Feature: R3 can simulate and copy any IC and ID cards , like access control cards of House door or Building door, Elevator card, Parking card, Time card, Payment card, Supermarket card, transportation card. R3 has Build-in Germanium, Volcanic Magnet and FIR Energy Stone in this ring , it can improve human performance effectively. R3 carries a new NXP smart NFC chip, it brings top speed operation experience to the following Android mobile NFC features, like "Private Note","Mobile phone lock","Quick start","Share information". R3 No need battery charging and IP68 Waterproof.