- Alarm Lock Prox Reader/Enroller (For Use With Prox Lock)Prox Card Reader/Enroller Enables instant, automatic enrollment of Prox Cards into DL-Windows (just tap the Prox Card/fob device to the unit’s faceplate to enroll)! Supports all prox cards and prox keyfobs. Simultaneous card enrollment, downloading or lock polling – all on just one serial port. Replaces AL-PCI. 9V Battery operation (6 mos. to 1 year, typical).