... cleaning effect is good, is the most ideal, the most affordable cleaning equipment. Ultrasonic wave clearer (simplex, two-cylinder, multi-cylinders ... a cleaner, the cost is low and the cleaning effect is good, is the most ideal, the most affordable ... better; · 40KHz, 68KHz, 80KHz, 120KHz, 170KHz, 1000KHz, the effect is better; · monofrequent, dual-frequency, three frequency adjustments, satisfies the ...