... .56kHz 2) Material: ABS, PVC 3) Shape: keychain, fob, token, wris key Fobs/Keychain Smart Tag:4) Chip: TK4100, EM4100, T5557, Hitag2 ... or photo is available with printed 6) Color: gray, blue, red 7) Application: parking, car, access control8) Looks like articleEM Tag ... ) Applications: logistics automation, anti-counterfeiting, access control, industrialtransponder key Fobs/Keychain Smart Tag