A voice controlled assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The voice controlled assistant facilitates transactions and other functions primarily through verbal interactions with a user. In some situations, a transaction may require entry of a code, which the user may wish to enter in a non-verbal way. A control knob is rotatably mounted to the housing and non-verbal manual entry of the code may be accomplished via rotations of the control knob. In other implementations, the code may be entered through use of a companion application executing on another device separate from the voice controlled assistant.