iButton Touchkey Reader & Interface Pack contains two accessory components that allow the ELK Magic Module (ELK-MM443(S)) to read iButton Touchkeys from Dallas Semiconductor. This enables the Magic Module (ELK-MM443(S)) to be used as an economical access controller, time-attendance functions, etc. The small “dime sized” iButton is a rugged memory device containing a uniquely readable “non-repeating” serial number. The iButton Touchkey Reader Interface connects to the Magic Module through an 8 conductor modular cable (included). Applications include: high security access control, simple on/off switching, password authentication, etc.