Variable-frequency Ultrasonic Cleaning Machine You only need to add some water, this multi-functional ultrasonic cleaner can clean dirt in tiny gap. it can also be used to clean jewelry, pen or braces. Customize your favorite picture, pattern or text on ultrasonic cleaning machine. It will be an exquisite and practical gift no matter for personal use or for friends. ・Dimensions: 21.1 cm x 10.2 cm x 7.1 cm ・Weight: About 520g ・Material: SUS304+PC+ABS ・Input: DC 12V ・Power: 15W ・Ultrasonic Frequency: 40kHz ・Volume of Tank: About 400ml ・Independent T-AIR acoustic dialysis technology, high frequency vibration make the liquid molecules go deep into dead zone and provide efficient cleaning effect; ・You can choose regular or strong mode according to degree of dirt; ・Smart 40kHz-49kHz variable frequency for high effective cleaning and protecting items;  ・Expanding tank for easily putting large items; ・Customized color printing for single side, available for selfie, family or pet photo and text.