... stability6. With overheating protection circuit Digital Ultrasonic Jewelry Cleaner Application: Suitable for laboratory, electronic ... clean personal articles such as gold and silver jewelry, necklaces, earrings, glasses, nozzles, watches, mobile, ... denture, experiment and equipment. Digital Ultrasonic Jewelry Cleaner Specifications: ModelJD-20Ultrasonic Frequency40 KHzTank MaterialStainless ...