Note: -Based on laboratory data, we kindly recommend never using ultrasound to clean pearls, turtle shells, jade, etc. -If you are unsure if your items can be cleaned using this machine before cleaning unused jewelry, coated glasses, sunglasses, watches, and precious metals, please refer to the manufacturer's cleaning manual or maintenance instructions. -If you want to achieve better cleaning results, you can use professional ultrasonic cleaning solution (excluding) or alkaline cleaning agent (excluding), such as hand sanitizer, soap, dishwashing liquid, etc. Specifications: -Shell material: ABS -Rated power: 15W -Vibration frequency: 45Khz -Size: 22.5 * 10.5 * 7.5cm -Weight: 356g Package: -1 * Ultrasonic cleaner -1 * USB cable -1 * User manual