Aiphone AP-KITDB3, Hands-Free Audio Set, 3 Apartments. Hands-free audio intercom with 3 indoor phones and 1 outdoor unit. Includes: DB-1MD x 3, DA-4DS x 1, PT-121DR x 3. Fully 2-wire, including door lock power supply. No additional power required for the door opener to operate. Specifications: Included: DB-1MD x 3, DA-4DS x 1, PT-121DR x 3 Fully 2-wire, including door lock power supply Does not require additional power supply to operate the EL-12S door opener Completely hands-free use Communication: Hands-free or press to speak (for more privacy or in noisy environments) Additional function key Interruption of ringtone with optical indicator Datasheet:

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