DoorComTM provides long-range, 2-way wireless communication from a loading dock or other locked door area directly to business-band 2-way radios. Improves efficiency, security at any facility. Installs easily at any entry point. Provides coverage of 350,000 sq. ft. (actual range depends on building structure and topography). Rugged, compact and weatherized all-metal intercom box mounts on the outside of the facility; transceiver mounts inside the facility - safe from the weather and vandals. MADE IN THE USA - Carmel, Indiana.