A practical package with everything you need to install an intercom system, and all at a reasonable price.Product features:Multi-wire set for two-family houses Good voice quality Voice volume for door station and house telephone continuously adjustable Electronic ring tone Door opener function (electric door opener is connected directly to door station) Connection of additional house telephones possibleTechnical data:SET for two-family houses consisting of: 2x house telephone MIRO 1x transformer 1x surface-mounted door station MIKRADimensions: Door station: 179 x 99 x 23mm House telephone: 90 x 200 x 42mm Transformer width: 3 sub-units (54mm) Installation instructions:Note: