Abstract: The invention is directed to an electrically powered device for the treatment of hair, in particular for the styling and/or drying of hair. This device is equipped with a first adapter element, for example, a plug-and-socket element, for connecting, in particular electrically, the device with an additional electrically powered device for the treatment of hair, which includes a second adapter element. In this arrangement, the first and second adapter elements include differentiating elements, in particular geometrical differentiating features, which are designed such that exclusively two devices equipped with corresponding differentiating elements are connectable with each other. The two connectable devices may be a hair dryer and an additional implement for a hair dryer, for example.