20pcs 125KHz Blank RFID Proximity ID Token Tag Key Keyfobs

Note on 2015-4-20th :
The key is really Blank now, it's our stock wrong before~ thanks for your support
Description :
20pcs 125KHz Blank RFID Proximity ID Token Tag Key Keyfobs For Access System
Features :
Small, durable, and do not fade.
Waterproof, shockproof, anti-corrosion.
Can be hung on channeling keychain for easy carrying.
Each token pre-programmed with unique ID which is printed on it.
Water resistant, each comes with Key ring included.
Compatible with all RFID reader to gain access and write programme.
Specification :
Operation frequency : 125Khz (Read and Write)
Card read distance : 0-10 cm
Read and write time : 1 ~ 2ms
Operating Temperature : -20 ¿¿¿ ~ 85 ¿¿¿
Package includes :
20pcs x 125KHz Blank RFID Keyfob
Details pictures :