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RETRO-M Intercom System is designed to update older intercom systems – using your existing 3, 4, 6 or 8 wires. Complete RETRO-M Intercom 5 Rooms. Room adaptor and trim plates that allow installation of new stations into existing intercom wall openings without requiring drywall repair, even if the fit is not exact.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.