100pcs EM4100 125khz ID Keyfob RFID Tag Tags llaveros llavero Porta Chave Card Sticker Key Fob Token Ring Proximity Chip TK4100

Num3 TK4100 EM4100 Key

Please note, EM4100 chip is read, that is, it can not be recorded. If you want to buy a rewritable chip, you have to buy the chip EM4305 tags.
Please open the link to purchase EM4305 chip tags.
http://www.aliexpress.com/store/group/EM4305-125khz-Rewritable/1427387_506391004.html

Material: ABS
Response frequency: 125 KHz,
Chip type: TK4100 which compatible with EM4100
Operation Temperature : -40 - 85°C
Waterproof
Each comes with Key ring included.
Each token pre-programmed with unique ID which is Laser printed