The customer lived in a house that is made of solid concrete and needed an intercom that would penetrate the concrete. Cordless telephones do not work in his house. He also had a gate up front that he wanted to monitor.
The MURS Multi-Mile Intercom will penetrate the concrete walls. The MURS Callbox XT Outdoor Intercom is a waterproof wireless intercom that works with the inside base station intercoms. It is waterproof and in a hardened case.
The MURS Basic Commercial Callbox could also be used, but the antenna must be wrapped with a waterproof tape per manufacturer’s instructions. The tape is available at building supply stores.