Special protection circuit, intelligent control system Small and lightweight, easy to carry and easy to operate Pervasiveness, all object surfaces can be cleaned in the liquid Nondestructive cleaning, ultrasonic cleaning won't make the object cause any damage Remove dirt, dust, and grease from the tiniest of places using ultrasonic technology Suitable for cleaning jewelry, glasses, circuit boards, ornament, headwear, brooch, pen, CD, toothbrush, false teeth, milk bottle, fruit, clock, exact instruments etc.