LUCINE 100 x 125 KHz RFID Key Ring Access Control Card Key Ring for Door Access Control System TK4100 / EM4100 (100IDPCS-Blue)

1. Waterproof RFID keys proximity door control access.100% brand new high quality ABS material. 2.Each key ring has already been pre-programmed with a unique ID number, you can't reprogram it. 3.Suitable for 125KHZ card reader and the reading distance is 0-10cm. 4. Widely used in apartment, office, park and other places. 5.Support Read only, not writable. Not compatible with other frequencies such as 13.56 MHz. Incompatible with encrypted tags such as HID.