1. Health module-remove infrared ray and adjust body function. 2. Jakcom R3F NFC smart ring compatible with Smartphones of Android/WP systems having NFC function. 3. Full U.S. sizes, suitable for different finger size. 4. Improve human health and prevent disease. 5. Simulate IC cards and ID carsd-you can use R3F as house door key, elevator card, parking card, attendance machine, payment cards, Pos machine, Supermarket card, Bus card, Metro card. 6. Program lock: Your mobile phone only opens for you. 7. Automatic running: Convenient and fast fashionable experience. 8. Start hide: The highest level personal privacy protection. 9. Business card share: Leave your contact information stylishly. 10. Whisper: Communication requires just one interaction. 11. Link share: Information consulting, enabled by one click. 12. Network disk sharing: Goods should be shared. 13. Made of high fast dual core NFC chips, data transmission fast, and storage data for long time, it is safe and stable. 14. Kindly reminder: Do please make sure your phone supports NFC function.