Häfele Transceiver Module enables compatible wired Video Door Phones to wirelessly trigger unlocking of the Classical Digital Lock. The transmitter and receiver communicate over 433 MHz, while the receiver module is integrated within the lock's interior panel.

The wired transmitter module connects to the compatible VDP outdoor unit and 12V power supply. When a visitor calls through the VDP, the indoor unit can be used to grant access by pressing the unlock control, sending the unlock signal to the Classical Digital Lock.

The module is not included in the Classical Digital Lock kit and must be purchased separately. Only wired Video Door Phones with door-unlock functionality through relay changeover contacts (Normally Open and Common) are compatible.