Type: NFC Smart Ring Apply for:Android,WP Material: Titanium Steel Color: Black Size: 7, 8, 9, 10 Package Includes: 1 X NFC Smart Ring Notice: 1.Please allow a little color error . 2.Please allow manual measuring permissible error. 3.Not all phones are universal, please read the introduction carefully before buying. Function: Function 1:Health protection function, prevent electromagnetic wave radiation, regulate the body. Fashion jewelry, couple rings. Function 2 (with NFC mobile phone support): mobile phone unlock, information sharing, business cards, etc. Feature 3: IC/ID/NFC chip simulation, can copy the card(entrance guard card, Access card, meal card, elevator card, attendance card)Do not support the bus card, subway card and bank card. Tip: lphone no NFC function, so only apply function 1 and function 3, can not apply function 2!