... guarantee more stability6. With overheating protection circuit Digital Ultrasonic Jewelry Cleaner Application: Suitable for laboratory ... pressure washes, porcelain, medical examination apparatus, tool kits, jewelry set, DVD, PCB/FPC and baby toysOur digital ... , watches, mobile, denture, experiment and equipment. Digital Ultrasonic Jewelry Cleaner Specifications: ModelJD-20Ultrasonic Frequency40 KHzTank ...