You can use RVV4(4 core wire)/Cat5/Cat6 wires to extend the distance for monitor to doorbell, monitor to monitor according to your need, maximum distance 100-200 meters. The item "TMEZON Video Door Phone Doorbell Intercom System, Door Entry System with 7 Inch" is in sale since Friday, July 24, 2020.
This item is in the category "Home, Furniture & DIY\Smart Home & Surveillance\Smart Home Access\Smart Doorbells". The seller is "sycommercial" and is located in DN31RA, Doncaster.
This item can be shipped to United Kingdom, Japan, Canada, Ireland, Australia, Germany, France, Greece, Italy, Spain, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, Hungary, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Sweden, Bahrain, Brazil, New Zealand, Israel, Hong Kong, Norway, Mexico, Singapore, South Korea, Switzerland, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Dominican republic, Qatar, Uruguay, Viet nam.