Too often ear cleaning can be detrimental to your health. It is not an ears to scrape. Strong vibration & suction can be cleaned at once. The average length of the human body, 2.5cm nozzle length does not enter deeply, you can use with complete confidence. Young & old (child is used with mother) it is convenient because it is possible to use by all alone. You can use it with complete confidence without hurting your ear with a soft rubber nozzle. Power Supply: 1 x AAA Battery (NOT included)