Model 3406 5 or 6 Wire Apartment Stations The Pacific 3406 system is designed for new construction as well as renovations. Type: Standard Finish: High impact white plastic Buttons: Momentary action button marked talk,listen, and door Size: 7" H x 6"W x 13/16 D Mounting: Surfaces mounts directly to single or dual electrical box, or directly to apartment wall Electrical: 45 Ohm speaker-mic 6 wire terminals This Pacific Electronics apartment station is a universal replacement for Pacific, and tek tone. Not compatible with other systems. Please understand there may be some changes in wiring.