Domary R4 - Size 12(ID 21.4mm / 0.84in C 67.2mm / 2.65in)

[Cloud Sharing] The r4 smart ring​ allows for quick sharing of encrypted text, electronic business cards, website pages, and disk files with a single key press. its innovative design and radio energy power source eliminate the need for charging, ensuring uninterrupted usage day and night. [Versatile Compatibility] The r4 ring​ is ip68 waterproof​ and suitable for all phones with nfc function. from 125khz to 13.56mhz frequency band, it offers diverse functionality and convenience for users, making it a must-have accessory for individuals seeking seamless connectivity and efficiency. [Excellent Material] The r4 smart ring​ is crafted from microcrystalline ​ ceramics, offering outstanding refractive index and dispersion performance, resulting in a unique luster. its warm and jade-like touch is a product of the low thermal conductivity, providing external rigidity and internal flexibility. [Enhanced Performance] The r4 features a newly designed circuit structure that reduces electric field interference, increasing transmission distance by three times compared to the previous generation. this enables seamless compatibility with various card reading devices and supports encryption cards across multiple format standards. [Multi-functional] Equipped with two nfc modules, the r4 ring​ can easily access built-in cloud services without the need for an app installation. it is compatible with both ​ and ios platforms, allowing users to Actuator​ real-time calls, notifications, and access chip's exclusive notepad with ease. Spec: Item Type: Smart Ring​ Material: Ceramic, Electronic Components Protection Level: IP68 Applicable ​: All Phones With NFC Function Package List: 1 x Smart Ring​ 1 x Instruction How To Use: 1. IC card module: This module is equivalent to a repeatable read and write IC card, supporting the simulation of 13.56MHz M1 (for ​​ 1) type IC cards; 2. ID card module: This module