Sinthesi offers you the possibility to choose not only between different system models, but also between numerous installation solutions that meet your space requirements and your needs. Sinthesi is a keypad in modular design that can be installed both horizontally and vertically.Product features:Door loudspeaker series SINTHESI Installation only in TL 1148/21 and TL1158/21!With high-quality and weatherproof loudspeaker and electronic microphone Volume of the door station and the house telephones continuously adjustable Including intercom lock for two bell buttonsTechnical data:Compatible with system 1+n technologySupply voltage: via transformer GT1976 Dimensions: 129 x 78 x 26mmInstallation instructions:Note: