A112x series:
The A112x series has a built-in RFID reader for access control with two possible operating frequencies: 125 kHz or 13,56 MHz.
The operating frequency can be configured in the DoorBird app. Parallel operation of both frequencies is not possible.
A maximum of 500 key fobs can be registered.
D21x series:
The D21x series features a built-in 125 kHz RFID reader for access control (Active Reader Passive Tag (ARPT) system), as specified in ISO/IEC 18000-2:2009 Part 2.
A maximum of up to 500 key fobs can be registered.
D11x series:
The D11x series does not have an integrated RFID module.
D10x/D20x series:
The D10x/D20x series has a built-in 433 MHz transceiver, which was originally planned to control additional sensors and remote controls (e.g. garage doors). Unfortunately, there was not only too little demand in this regard, but also a lack of third-party providers using corresponding modules. The 433 MHz module therefore remains inactive.
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