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Using only water, this cleaner generates ultrasonic waves that gently remove dirt and grime in minutes. The ultrasonic sound waves for a deep and gentle clean to dirty jewelry, eyeglasses, watches, utensils and more. Extremely easy to operate, and great for business, commercial or home use, this ultrasonic cleaner will have your items looking brand new again. The Polarized sunglasses cannot washed by water or ultrasonic cleaner, for it may bring the destructive effect of the lens coatings.