Smart Ring Wearable Device

Product information:
Product size: S (small), M (medium), L (large)
Carrier frequency: 13.56MHZ, 125KHZ
RF distance: 1~3cm
IC chip: CUID x2
ID chip: T5577 x2
NFC chip: Ntag216 x2
Host material: ceramic
Protection class: IP56
Operating temperature range: -50 degrees - +80 degrees

Packing list:
Ring + manual * 1 set