["brand new and high quality\nFeatures:\nUpdate for Health Material: R4 ring for health index is fully upgraded It made of Micro crystalline Zirconium Ceramics, blended with Germanium Grail, Volcanic Magnet and fir energy stone, contributing a lot to wearer's for health. Crystal ceramic has trace elements which can improve the human metabolism and effectively promote blood circulation; fir e energy stone can help people effectively resist the electromagnetic wave from computer ,phone or electrical appliance.\nAesthetic and Wear-resistant: High-quality materials make it extremely hard. This ring has four times the hardness of the alloy, which makes it not worn out due to scratching in daily life. At the same for time, it has excellent refractive index and dispersion performance, allowing the whole to emit a unique luster.\nFunction Upgrade: The fourth-generation for smart ring is equipped with multiple sets of RFID for smart modules, which can simulate four non-contact sensor cards at the same for time. In addition, the newly designed circuit structure greatly reduces the electric field interference between the modules. Compared with the previous generation, this product has increased the sending and receiving distance by 3 times. It can be easily for various card reader devices.\nWaterproof Dust and Fall Proof: IP68 waterproof level, dust-proof and excellent resistance to fall and rolling resistance can be competent to the application requirements of any occasion. No need battery charging, make you forget the recharging and wiring harness, and use it at any for time.\nWide Compatibility: The NFC function has been redesigned. It supports almost all mobile phone applications on the market.Support phone models.\nRing only, other accessories demo in the picture is not included!\n\nSpecifications:\nMaterial: Microcrystalline Zirconium Ceramics\nOptional Size: A, B, C, D, E\nA Size: Inner Diameter Circumference: app.5.71cm/2.25in, Diameter: app.1.82cm/0.72in\nB Size: Inner Diameter Circumference: app.6cm/2.36in, Diameter: app.1.9cm/0.75in\nC Size: Inner Diameter Circumference: app.6.28cm/2.47in, Diameter: app.2cm/0.79in\nD Size: Inner Diameter Circumference: app.6.6cm/2.60in, Diameter: app.2.1cm/0.83in\nE Size: Inner Diameter Circumference: app.7cm/2.76in, Diameter: app.2.22cm/0.87in\nColor: As the pictures shown\nQuantity: 1 Pc\n\nNote:\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 x Ring"]