PREMIUM SUS304 MATERIAL - Tank Size: 6L/1.59 Gal; Ultrasonic Power: 180W; Heating Power: 300W. This ultrasonic cleaner is constructed with sturdy 304 stainless steel, ensuring no water leakage and long service life. A ball-shaped basket is available to decrease collision between sharp items and the tank. 40KHZ DEEP CLEANING - 40kHz ultrasonic frequency allows the ultrasonic jewelry cleaner to quickly clean small items with complex construction or irregular shape. The industrial-grade transducers create millions of microscopic bubbles that powerfully clean your possessions while saving time and energy. MECHANICAL KNOB CONTROL - The jewelry cleaner ultrasonic machine features two mechanical knobs to adjust functions, with an adjustable timer (0-30 min) and heater (68-176?/20-80?). A heating function can effectively soften and dissolve stubborn marks, thereby improving the cleaning effect.