Feature:1. Ceramic Material: The R4 ring is made of microcrystalline zirconium ceramics, with excellent refractive index and dispersion performance, giving off a unique round luster overall.2. Nano Characteristics: The nano characteristics of external rigidity and internal flexibility are attributed to the low thermal conductivity of microcrystalline zirconium, which gives R4 a warm and jade like touch.3. Upgrade Circuit Structure: The newly designed circuit structure significantly reduces the electric field interference between various modules, and increases the transmission distance by three times compared to the previous generation product, making it easily compatible with various card reading devices.4. Frequency Band: From 125KHz to 13.56MHz frequency band, the R4 ring can simulate encryption cards or cards with multiple format standards5. NFC Modules: Through the two sets of NFC modules, it is possible to run its built in numerous characteristic cloud services separately. No need to install an app for direct use, and suitable for both for Android and for IOS platforms.6. Quickly Trigger: R4 can quickly trigger a real timed call on any phone. R4 can quickly trigger multiple preset notifications on any phone. R4 can quickly open the corresponding chip's exclusive notepad on any mobile phone.7. Share Cloud Information: R4 can share various cloud information with one key, such as encrypted text, electronic business cards, website pages, and network disk files.8. Power Supply: R4 is powered by the radio energy of the reading and writing device, which does not require charging, and there is no need to worry about battery life. It is a device that can accompany you day and night.Specification:Item Type: Smart RingMaterial: Ceramic, Electronic ComponentsProtection Level: IP68Applicable Models: All Phones With NFC Function.Package List:1 x Smart Ring 1 x Instruction