A practical package with everything you need to install an intercom system, and all at a reasonable price.Product features:2 wire set for a single-family home Ideal for new buildings and modernization Good speech quality Speech volume for door station and house telephone can be continuously adjusted Electronic ring tone Ring tone volume can be adjusted in 3 levels Door opener function (electric door opener is connected directly to the door station) Connection of additional house telephones possibleTechnical data:SET for a single-family home consisting of: 1x house telephone UTOPIA 1x transformer 1x surface-mounted door station MIKRADimensions: Door station: 179 x 99 x 23mm House telephone: 228 x 143 x 50mm Transformer width: 3 sub-units (54mm) Installation instructions:Note: