Abstract: The odometer in particular for a cycle comprises a case 1 containing a micro-processor connected to a movement sensor associated with a wheel of the cycle, a display for the items of information and at least one control key relating to the display of the items of information processed by the micro-processor. The control key is constituted by at least one part of the upper side of the cover 3 of the case 1, which cover is pivotally mounted on the bottom 2 of the case and it includes devices for emitting sound signals respectively corresponding to the nature of the magnitudes appearing in the display devices and seen through a window 12 of the case.