A default is the normal setting of a feature. For example, when you first switch Roamer on it runs at 25 cm/sec. That is Roamer’s default speed. Roamer uses default settings at the start of a GO Program and when you switch the robot on. Roamer’s voice is another default: how the robot behaves when it completes a sense-procedure is another. You can change some of the defaults – see Advanced Roamer.