1.Industrail cleaning machine 2.High frequency. 3.Cleaning function is good 4.Ultrasonic wave control 1.Industrail cleaning machine 0.6L. 1L. 2L 3L. 4L. 6L. 10L. 15L. 22L. 30Leven more bigger size are availablehigh quality with low price2.FeaturesIsolated-Circuit Design, Keep Water Away for Extra SafetyWide-Diameter Transducer for Best Cleaning Result.Professional DesignPowerful transducer and ...