This essay addresses the effects and experiences that become possible, and become the object of fascination and reflection, when early German radio mobilized-when it moved out of the studio to transmit from places in the "outside world." Mobile electro-acoustic technologies enabled a new sense of exteriority and new experiences of time and space. The paper reconstructs and analyzes three rhetorical figures associated with this mobilized radio. First, the complex concept of actuality, among other things, referred to temporal liveness and the palpable auditory presence of location sound. Second, the popular rhetorical and visual image of the "traveling microphone," emphasized new relations of inside and outside, studio and world, reality and representation. Third, comparisons between radio and film-including the term "radio-film," an early name for live location broadcasts-provided a vocabulary for understanding the properties of a mobile radio, including the intense sense of an outside world made present for the listener at home.