Jakcom Smart Ring is made of liquid tungsten and has been processed through 72 hours and 39 steps of process. With higher strength, fixed colour and non-allergic. Inlaid with magnet, germanium and fir energy stone on the inside of the ring. So it can effectively improve human beings' energy, stamina, physical strength and also block electromagnetic waves., , The side letters M1, ID are equipped with dual-core MCU NXP chipset which could imitate and copy various kinds of 1C, ID smart card chip such as house door, building door, elevator card, parking card, attendance, shopping cards, transportation cards and other inductive cards., , The side letters NFC is equipped with high-speed intelligent NFC chip. With 106 kilobytes per second wireless transmission rate, 100,000 write cycles durability. So that could guarantee all of the features efficient and stable operation.