The current premium product in our standard phone range is the D-400, whose tidy design, dominated by a large touchscreen, fits well in any modern office environment. Its high-resolution color display with capacitive touch is designed for intuitive operation and adapts the visualization based on the situation. An all-around visible housing LED ensures that even during calls with a concealed headset, everyone can see that a call is in progress. Incoming calls and missed calls are also prominently displayed. The D-400 showcases its professional versatility in terms of expansion options: whether you use the D-400 with its 20 digitally labeled and freely programmable function keys or expand it to 80 keys with the D-XT20 key expansion module, everything connects through the two USB ports. The ideal companion for the office and home office.