Elma S-series continuous duty, commercial ultrasonic cleaning machine. Large 2.75 litre anti-cavitation stainless steel tank. Micro-processor controlled frequency sweep ensures rapid degassing, and eliminates cleaning "dead" zones found in lower quality ultrasonic cleaners. Sweeping 37-41kHz frequency range is ideal for jewelry, dental, and medical device / parts cleaning. Powerful ultrasonic bath heating with separate controls. 3/8" Drain line with valve for easy cleanout. 2 Year warranty. Made in Germany.