DUOX KITS only require two non-polarized wires for installation, maintaining the highest quality in the product and design, which simplifies the installation of systems. All the necessary equipment for a complete installation of a video door entry unit is included (it does not include the interior monitors of the houses and the connectors). Includes: 70738.- CITY DUOX 4CP103 plate. S4: 130x199mm. 8949.- S4 kit embedding box: 115x185x45mm. 2008.- 8 calls extension module. 3255.- Line termination (2 units.). 3244.- Power adapter module. 4802.- 12VAC/1A power supply. DIN4. 4812.- 18VDC/1,5A power supply.