There is disclosed herein a limb-mounted device that is controlled by one or more inputs disposed within reach of the fingers of a user on the same hand that is associated with the limb. The inputs may be disposed upon a retractable or removable surface so that they have an operative position, in which they are within reach of the fingers, and an inoperative position, in which they are stowed outside reach of the fingers, but in a manner otherwise convenient to the user.