... Optional frequency range: 15 to 60kHzCommonly used frequency: 20kHzEach unit nominal power: 500W, 1000W, 1500W, 2000W, 3000W ... is lower, the greater the power of each unit; the higher the frequency, the smaller the power ... of each unitAlso can unit combination to useTools head (probe) materials: stainless ... -power Ultrasonic Sound Focus Probe Type Sound Chemical Processing System