The wireless intercom system that uses broad-spectrum is able to communicate up to 1000meters. As for intercom systems, video intercom systems are the main users of this range, while the wireless video market was recently suspended. There are known systems that use wireless intercom FRS. The most recent addition to the wireless intercom market is products WALLS frequency range. MURS is a service (Very High Frequency) VHF 150 MHz spectrum. MURS wireless intercom is necessary if you have a large property, or if you need to talk between buildings. Not only can you get military grade radios with headphones and many options, but you can get the telephone base station, the wireless telephones with the option of solar energy, wireless audio systems, customer service phone boxes, switches, wireless remote and motion detection devices. For commercial or residential units, an intercom system has 900MHz and external intercom doorbell can be used with the intercom. There is a wide range of intercom systems on the market. These are specially designed voice door phone or electrical devices that are used for private conversations. Voice services not only enjoying the services of telephone, but also various video services are also available in this high-profile security service. Connection services are more expensive security features, intercoms port holes for the eyes moved to the door.