The flexible Doorbird 423866836 Multi-Tenant Module MTM14E, for connecting up to 14 third-party call buttons with LED illumination, for DoorBird D2100E, with LED illumination for the D21x series without a keypad can connect up to 14 third-party call buttons from almost any call button manufacturer. Call buttons connected to the digital inputs of the MTM14E for button switches (“E, E“) must be potential-free.
Dimensions: 2 x 0.6 x 5.2 inches (H x W x D)
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