POWERFUL ULTRASOUND: 45,000 Hz of sound waves that produce an abundance of tiny bubbles in the water. These bubbles do the heavy lifting of removing soap, grime, and dirt from your jewelry. It's safe to use on both gold and silver jewelry items, but note that it won't have the lifting power to remove serious tarnish from silver jewelry items.You can add dish soap or jewelry concentrate for a deeper clean if you wish.IT IS SAFE AND ECO-FRIENDLY: It produces a very minute amount of noise.The body interior is made of stainless steel to ensure that it lasts long for you, even in extreme conditions.This offers you an entirely safe cleaning process for both you and your items. You also do not have to worry about the plastic body; it is also durable.The lid of this ultrasonic cleaner is transparent , so that you can observe the inside cleaning situation anytime while the cleanser is working.AFFORDABLE AND CONVENIENT: The simple 1-button design easy to operate.It produces a very minute amount of noise.It is quite portable. The portable washing machine is lightweight, which means you can move it from one location to another without worrying about its weight. 340ml capacity water tank allows you to put the eyeglasses jewelries or other tools into it.WIDELY APPLICATION AND SUITABLE FOR MANY ITEMS: This jewelry ultrasonic cleaner can be used many kinds of items and areas,and designed for cleaning the jewelry,eyeglasses,watches, rings,necklaces, pen head, PRINTER CARTRIDGE, invisible braces, contact lenses,etc. But it is not suitable for micro-fiber,pearls,coral,emeralds,jades. In addition,our rings necklaces eyeglass cleaner are also for eyeglasses shop, jewelry shop, watch shop, electronic workshop, office and household use.