Multifunctional Waterproof NFC Smart Rings

Here’s the updated version with the new size chart replacing the old one:

Features:

• Water Resistant: No charging required.
• Quick Unlock: Lock and unlock your smartphone or tablet easily.
• App Control: Automatically start preconfigured apps with a touch.
• Privacy & Encryption: Store and exchange personal information securely, with support for encryption.
• File Transfer & Sharing: Compatible with Android and Windows NFC-enabled devices.

Functions:

• Set up smart locks.
• Recharge cards.
• Unlock smartphones.
• Lock important phone files.
• Transfer files easily.

Specifications:

• Material: Stainless steel

• Color: Black, Silver

• U.S. Size	6	7	8	9	10	11	12	13
  Diameter (mm)	16.5	17.4	18.2	19.0	19.9	20.7	21.5	22.3
  Circumference (mm)	52	55	57	59.8	62.4	65	67.5	70

• Transmission Rate: 106kb/s

• Working Frequency Band: 13.56 MHz

• Storage Space: 144 bytes

• Chip: NFC chip

• Product Weight: 7g (0.2oz)

• Package Weight: 10g (0.3oz)

• Package Size: 3 × 3 × 2 cm (1.1 × 1.1 × 0.7 inches)

Notes:

• Item color may vary slightly due to lighting and monitor differences.

Package Includes:

• 1 × Smart Ring
• 1 × User Manual

Let me know if more refinements are needed!