The surface-mounted Busch-Welcome indoor stations are set apart by their clear, functional design. Large, easily accessible keys ensure intuitive operation of the functions. The handset is simple and foolproof to use. A full duplex function ensures users can speak and hear at the same time. Noise interference suppression and echo compensation make for a clear sound. Five different ring tones are available to help distinguish between calls from outside the main entrance or the apartment door. The Busch-WelcomePanel has a large format, high-resolution TFT touch panel with a high-contrast coloured image, that shows who is at the door. The equipment is available in three colours: studio-white matt, alusilver and anthracite matt.