As a second communication level, the modern office communication system D9000 offers many features that can not only be easily adapted to your circumstances, but also significantly shorten your internal communication channels.Product features:TransformerFor local power supply of the D9003, D9016 and D9017Technical data:24 EP18Output voltage: 18V (AC) Dimensions: 72 x 72 x 70 mmInstallation instructions:Note: