Domed Sapphire Crystal, scratch resistant with Anti-Reflective (AR) treatment, beveled edges on both sides, domed on both sides
Icode Slix (NFC enabled) IC chip inside watch glass, contactless transmission of data (read&write), operating distance up to 2cm, operating frequency 13.56 MHz
This is a generic Sapphire Crystal that can be used to replace one original watch crystal.
The IC chip inside the domed sapphire crystal is unclonable and tamper proof. It makes each watch glass unique & 100% authentic.
Winwatch's NFC equipped Sapphire Crystal is a passive device meaning that it doesn't hold a battery and it's absolutely maintenance-free.