Portable Ultrasonic Cleaner: Frequency: 47kHz, Material: Plastic&Stainless Steel, Size: 210*100*58mm, 47kHz : Generates 47,000 Hz of ultrasonic sound waves for a powerful yet gentle clean that won't harm your valuables; Cleans dirty jewelry, eyeglasses, Braces, watches, utensils and more in minutes using only tap water, make your items dhine again. (Note: 1. does not remove tarnish; 2. if you want better cleaning results, you can add detergent for better effect). Large Capacity:300 ML is enough to thoroughly clean one or more items at once, saving you time. Water tank size is 155*68*40mm, which can cover most larges products like sunglasses. Easy Operation: The ultrasonic cleaning machine will auto shut off once it reaches the preset time (3-Minute Fast Cleaning or 5-Minute Deep Cleaning), touch screen enables you to operate it smoothly and easily. High Quality Materials-This ultrasonic jewelry cleaner machine comes with ABS high-end outside material, which makes it strong and durable. SUS 304 stainless steel liner provides good corrosion resistance. This ultrasonic jewelry cleaner for all jewelry has a transparent cover, so you can see the cleaning process