ACR1255U-J1 may be used to simplify access control. For example, instead of tapping contactless cards onto readers at every transaction, users with authorized contactless ID cards and the ACR1255U-J1 can simply walk within/out of range of digital printers, networks, computers, or doors to be logged on/off. ACR1255U-J1 may also be used for e-government, mobile banking and payment, healthcare, loyalty, and public key infrastructure applications.