• Multifunctional RFID Ring: The JAKCOM R4 is a versatile RFID wireless radio frequency ring featuring built-in IC and ID modules to replace access cards, parking cards, membership cards, and other wireless RF cards
• NFC Integration: With an integrated NFC module, the R4 offers unique cloud services, including virtual call alerts, location notifications, business card sharing, and note-sharing
• Simplify Access Control: Conveniently replace traditional access cards with the R4 Smart Ring's IC and ID modules, enhancing security and ease of access
• Enhanced Connectivity: The NFC capabilities of the R4 enable seamless interaction with various smart devices and services, making it a versatile tool for modern lifestyles
• Stylish and Functional: Not only does the JAKCOM R4 offer cutting-edge technology, but it also boasts a sleek and stylish design, making it a fashionable accessory for everyday wear

Regarding Size Measurement:

• Use a non-elastic thread to wrap around your finger snugly.
• Slightly tighten the thread; otherwise, the ring size may be too large.
• Straighten the thread, measure the length, and choose the size based on the table below: Standard US Sizes - Size 8: 57mm, Size 9: 60mm, Size 10: 62.8mm, Size 11: 66mm, Size 12: 70mm.

Specifications: