The Miniguide uses ultrasonic echo-location to detect objects in its vicinity, vibrating based on the distance to objects—the faster the vibration, the closer the object. A headphone jack can be used to provide sound feedback. The Miniguide supplements the information provided by a guide dog or cane—an interesting alternative for visually impaired or blind users.The Miniguide is not to be used as a primary aid.Dimensions: Size: 3" long, 1.5" wide by 0.9" thick Weight in ounces: 2.32 (66 grams) with battery installed Battery: CR123A 3 Volt (often used in cameras) included with Miniguide * Note: We do offer the Miniguide Holster (our model number 541024 which is listed below in related products).** Per the user manual, "The Miniguide contains a single battery, a CR123 type lithium battery. This type of battery is commonly available, particularly from stores selling photographic supplies. Only use batteries from well known and respected manufacturers. Spare batteries should be kept in their original packaging in a cool dry place."
