The Miniguide Mobility Aid is a handheld device that uses ultrasonic echo location to detect objects in front of the walker. Vibration rates increase as the walker gets closer to the object. 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 user's environment and skill level. Preferred ranges can be set up on a preset setting for quick toggling between up to 3 preset ranges. Audio feedback is available both for training purposes or as an alternative to vibration, when used with an earphone. Low battery warning. Uses 1 CR123 lithium battery, included.