**Product Details** 1. Replace your wallet of cards with a single ring. The built-in RFID modules can store and emulate Access, Parking, Membership, and Shopping cards for convenient, hands-free use. 2. Share information instantly with a tap. Utilise the NFC module for virtual calls, scene notifications, and seamless sharing of business cards or memos between Android and iOS devices. 3. Crafted from durable micro-crystal zirconia ceramics. The ring is designed to resist daily wear and scratches, maintaining its appearance over time. 4. Operate with ease across platforms. Two independent NFC modules allow for different functions to be assigned for use with Android and Apple iOS systems. **Specifications** 1. Material: Ceramics 2. Standard US Ring Sizes: #8 (57.1 mm), #9 (60 mm), #10 (62.8 mm), #11 (66 mm), #12 (70 mm) 3. RFID Module: Capable of emulating 4 contactless cards (IC type: UID; ID type: T5577) 4. NFC Module Type: Ntag213 5. Operating Distance: 1 - 3 cm **Package List** 1. 1 x Jakcom R4 Smart Ring 2. 1 x Manual **Friendly Tips** 1. Please verify your correct ring size before ordering to ensure a comfortable fit. 2. The effective operating distance for RFID and NFC functions is typically up to 3 cm. 3. Specific functions may vary depending on your mobile device's operating system and capabilities.