Global Video Intercom Devices Market Size study, by Device Type (Door Entry Systems Handheld Devices and Video Baby Monitors), by Devices Access Control (Fingerprint Readers, Password Access, Proximity Cards and Wireless Access), by Devices System (Wired and Wireless), Device Technology (Analog and IP-based), Devices End Use (Automotive, Commercial, Government, Residential and Others) and Regional Forecasts 2021-2027