912 Household Portable Ultrasonic Glasses Cleaner allows you to enjoy a professional cleaning & care service at home. You don't need to worry that the glasses are hard to wipe clean. Also, you don't need to send your precious jewelry and watches to the store for cleaning anymore. Use an ultrasonic cleaning machine, and you can wear brand-new jewelry every day and let the glasses have clear vision all the time. Use just water, It can generate 46,000 Hz of ultrasonic sound waves for a powerful yet gentle clean that won't harm your valuables. Great for business, commercial, or home use, this ultrasonic cleaner will have your items looking brand new again. Product with CE ,ROHS ,PSE,FCC certificate.