The RKDT-WM is a compact weatherproof mullion reader with a standard SIA Wiegand output. It reads Radio Key proximity cards, HID 26-bit proximity cards, and most HID proximity cards with non-proprietary formats up to 37 bits. It is also available in a switchplate configuration – model RKDT-WS. The RKDT-SA-M is a weatherproof standalone mullion reader, which controls up to 65,000 cards. It can also be converted to a Wiegand output reader, which allows the user to upgrade to a larger system. It reads Radio Key proximity cards, plus HID 26-bit proximity cards. It is also available in a switchplate configuration – model RKDT-SA-S. These units provide single-door access control with timed Antipassback, and no external control panel is required.