The Miniguide should be used as a complement to a white cane or guide dog. 5 different detection ranges can be set from 1.5 feet to 24 feet, depending on the users environment and skill levelpreferred ranges can be set up on a preset setting for quick toggling between up to 3 preset rangesaudio feedback is available both for training purposes or as an alternative to vibration, when used with an earphonelow battery warninguses 1 CR123 lithium battery, included