The DoorKing 1504-122 is a AWID Proximity Card Reader with Intercom Substation. The card readers operate on 12 VDC, 200mA. These card readers are not designed for stand-alone operation and must be connected to an access controller (DKS 1830 Series systems). All readers feature a cosmetically appealing design that will blend with any architectural design and offer high durability and reliability. The Readers are sealed in epoxy, making them vandal-resistant and are ideal for both indoor and outdoor applications.