RFID NFC Keyfob is also known as Keytag, Keychain, and it is a electronic device used for Access Control,Its  applications can be witnessed at Housing, Underground Parking Lot,Shopping Mall, library, E-Campus, Security Protection, Transportation and E-payment, which make our life comfortable. The available LF chips of RFID Keyfob include TK4100, EM4200, EM4305, T5577. The The available HF chips include MF S50, MF S70, Ultralight (C), FM08.Their memories include 64bits, 128bits,512 bits, 363 bits, 1K bytes, 4K bytes, 64/192 bytes.