... automatic constant temperature system 3.Stainless steel , durable sus304 ultrasonic parts clean1, Uses: Single family washing machine, use a little ... production;5, advanced third generation of generators, efficiency, better and more frequent, better quality;6,40 KHZ, 68KHZ, 80KHZ, 170KHZ, 1000KHZ ... , better.7, single-frequency, dual-, tri-band adjustment, to meet ...