... waterproof 3.network function IP video door phone, DVR video door phone,Video door phone, 4CH video door phone. 2-way audio ... system,Multi-language interfaces*Quad-or-full screen display, good video, quality and high resolution*Demountable, network access, Remote ... events and time search mode*Password protection function*Desktop or wall mounting*Monitoring, warning, remote door releasing*Night vision* ...