Telecommunication unit having a projection device and method for operating a telecommunication unit having a projection device

A telecommunication unit is provided, having a projection device for projecting image information onto a projection area located outside the telecommunication unit, the telecommunication unit being configured so that the projection device projects the image information in various first directions of a projection direction range onto the projection area, starting from the telecommunication unit. The telecommunication unit has an input detection device next to the projection device; the telecommunication unit being further configured so that, using the input detection device, a user input undertaken using a movement of a body part of a user is detectable; the user input taking place, starting from the telecommunication unit, in a detection direction range located outside the projection direction range; the user input being contactless with respect to the telecommunication unit.