Intelligent Ceramic Ring with NFC Multifunctional, Wearable Finger Device with Waterproof Scratch Resistant 6 RFID Cards Health Stones Contactless Payment, Tech Health Tracker

▶Waterproof and dustproof: The dustproof and waterproof grade is IP68, which can meet the application requirements of various environments. Powered by radio energy from reading and writing devices. No need to worry about battery life.
▶Dual energy stones: The ring is inlaid with two energy stones that adjust the EMFS of the human body, which is comparable to the adjustment ability of an energy bracelet. It is specially developed for modern life to help you improve your health.
▶Size selection: The inner diameter of the S ring is less than 58mm; the inner diameter of the M ring is 58-63mm; the inner diameter of the L ring is greater than 63mm. The entire body is made of microcrystalline ceramic, and its surface hardness is second only to diamond.